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  Many studies show the health benefits of dog ownership. Dogs not only provide comfort and companionship, but several studies have found that dogs decrease stress and promote relaxation. Dogs have positive impacts on nearly all life stages. They influence social, emotional, and cognitive development in children, promote an active lifestyle, and have even been able to detect oncoming epileptic seizures or the presence of certain cancers. But for all the positive benefits of keeping dogs, pet owners should be aware that dogs can carry germs that make people sick.
“Anytime you’re out with your dog,” says Pat Miller, author of The Power of Positive Dog Training, “one of you is training the other.” Better for it to be you. Begin as early as 8 weeks, before it picks up bad behaviors, and continue even into old age to keep your dog sharp. Make training about reward, not punishment. (Old-school devices like choke collars injure and instill fear, Miller says, “the most common cause of canine aggression.”) When housebreaking, “keep your puppy under close supervision and take it outside more often than he needs to go,” says Miller. “Reward it when it goes to the bathroom so it learns that this is the right way to do it.” Tip: “A well-trained dog has more opportunities to improve its physical health,” Miller adds. Walks, fetch, and agility training are more fun for you both if your dog will come when called, wait when asked, and greet other people and pups politely.
Some cancers can be cured, while others cannot. Please note that if your dog’s cancer is not curable, there are still many things you can do to make your pet feel better. Don’t hesitate to talk to your vet about your options. And remember good nutrition and loving care can greatly enhance your dog’s quality of life.
Older, small breeds of dogs are prone to congestive heart failure due to degeneration of the mitral valve. This condition is known to be inherited in Cavalier King Charles Spaniels. Degenerative valve disease is the most common form of heart disease in dogs.[23] Mitral insufficiency leads to turbulent blood flow and increased pressure in the left atrium. This causes increased pressure in the pulmonary blood vessels and pulmonary edema (a build-up of fluid in the lungs). Decreased output of blood by the left ventricle causes the body to compensate by increasing sympathetic tone and activating the renin–angiotensin–aldosterone system (RAAS). Increased sympathetic tone leads to increased peripheral vascular resistance and increased heart rate and contractility of the heart muscle. Chronic elevation of sympathetic tone damages the heart muscle. Activation of the RAAS results in increased retention of water and sodium by the kidneys, vasoconstriction, and other effects that result in increased blood volume. It also results in an increase in diastolic pressure and leads to pulmonary edema. Treatment for congestive heart failure has historically focussed on two types of drugs that address these concerns: diuretics (especially furosemide), which decrease blood volume, and ACE inhibitors, which interrupt the RAAS. Recently, pimobendan – which increases the force with which the heart muscle contracts, and is also a vasodilator – is being more widely used in the treatment of congestive heart failure caused by valvular disease. A major veterinary study, called the QUEST study (QUality of life and Extension of Survival Time), published in September 2008 found that dogs with congestive heart failure receiving pimobendan plus furosemide had significantly better survival outcomes than those receiving benazepril (an ACE inhibitor) plus furosemide.[24] However, ACE inhibitors and pimobendan have different mechanisms of action, and many veterinary cardiologists recommend they be used concurrently. Within the past decade, a new surgical technique has been developed for mitral valve repair that replaces or strengthens the mitral valve chords with polytetrafluoroethylene (PTFE) prostheses and tightens the mitral valve ring to reduce or eliminate regurgitation.[25][26][27][28]
An infectious disease is caused by the presence of organisms such as viruses, bacteria, fungi, or parasites (either animalian or protozoan). Most of these diseases are spread directly from dog to dog, while others require a vector such as a tick or mosquito.[1] Certain infectious diseases are a concern from a public health standpoint because they are zoonoses (transmittable to humans).
Eye diseases are common in dogs. Cataracts, canine glaucoma, and entropion are seen in dogs. Canine-specific eye diseases include progressive retinal atrophy, Collie eye anomaly, sudden acquired retinal degeneration, and cherry eye. Injury to the eye can result in corneal ulcers.
Squamous cell carcinoma* is a malignant tumor in dogs that most commonly occurs in the oral cavity, including the tongue, tonsils, and gingiva. Squamous cell carcinoma accounts for 5 percent of skin tumors in dogs, and are the most common tumor of the toe. Dogs with unpigmented skin on the nose may develop this cancer from long-term sun exposure.[161]
Some dogs have food allergies just as humans do; this is particular to the individual dog and not characteristic of the species as a whole. An example is a dog becoming physically ill from salmon; many humans likewise have seafood allergies.

Alcohols Commonly encountered alcohols in veterinary medicine are isopropanol and methanol found in household products and ethanol from alcoholic beverages. They all pose toxicity to dogs. Isopropanol which is found in rubbing alcohol has twice the toxicity of ethanol; however methanol which can be found in windshield washer fluid does not have the same retinal and neuronal toxicity on dogs as it does to humans and primates due to the differences in the way its metabolite formic acid is processed.[56]
Trapped Neutrophil Syndrome* is an autosomal recessive disease which results in mature neutrophils being unable to migrate from the bone marrow into the blood. Affected pups have chronic infections and fail to thrive. Other symptoms can include stunted growth and a ferret like facial appearance.[53] The disease is common in Border collies.[54]
Dogs infected with parvovirus need intensive treatment in a veterinary hospital, where they will receive antibiotics to control secondary infections, drugs to control the vomiting, intravenous fluids to treat dehydration and other supportive therapies.
Ventricular septal defect* is a hole in the division between the heart ventricles (interventricular septum). It is a congenital heart disease in dogs. There usually are no signs in dogs except for a heart murmur. However, a large defect can result in heart failure or in pulmonary hypertension leading to a right-to-left shunt.[49]
People most often become infected through flea bites or from contact with body fluids of infected animals. An example is a hunter skinning an infected rabbit or other animal. Bubonic plague is the most common form; symptoms include sudden onset of high fever, chills, headache, malaise, and swollen lymph nodes. The other two forms of plague, septicemic and pneumonic, cause more severe disease.
Valley Fever is the most serious and life-threatening of the group, mainly impacting hot, dry, dusty desert areas of California, Arizona, and Texas. The fungi are usually buried in the soil but can be displaced a number of ways—earthquakes, construction, rain—and released into the air where dogs can inhale it. If your dog develops respiratory symptoms, the disease can be deadly.
Hypoadrenocorticism, also known as Addison’s disease, is a reduction of production of glucocorticoids and mineralocorticoids by the adrenal glands. There is more familiarity with the glucocortcoids, such as cortisol; mineralocorticoids control the amount of potassium, salt and water in the body.[106][107][108] It is most commonly caused by destruction of adrenal tissue, probably by autoimmune disease. Signs include increased drinking and urination, vomiting, diarrhea, collapse, shivering and weight loss; at times neither the causes nor symptoms are especially specific.[109][110] Because of this it is sometimes referred to as “the Great Mimic” or “the Great Imitator”.[107][111] It is possible not to see any symptoms of the disease until the adrenal cortex is 90% dysfunctional.[112] Addison’s can occur when regular steroid use is abruptly discontinued; during their use, the system the adrenal gland does not function at 100%. The system senses sufficient levels of these hormones in the body and does not signal for their production. Tapering the medication off gradually allows them to return to full production after discontinuation.[110][112] About 35% of affected dogs are not diagnosed until they experience an Addisonian crisis, which outwardly appears to be a “classic” shock and is a medical emergency.[105][112] Hyperkalemia[106] can develop and cause severe bradycardia. Only typical Addison’s patients have the risk of Addisonian crisis due to the lack of mineralocorticoids.[110] Treatment is with supplementation of mineralocorticoids in daily pills or a monthly injection. The atypical form and the form caused by abrupt withdrawal of steroids do not need mineralocorticoids.[110] Glucocorticoids are usually supplemented with oral prednisone.[113][114]
Dogs in pet stores, animal shelters, and breeding kennels also are at increased risk. Overcrowding and poor sanitary conditions make it easier for the virus to spread. Certain breeds of dog (e.g., English springer spaniels, rottweilers, Doberman pinschers) and dogs that have another health condition may have a higher risk for developing severe disease.
Infected people will typically have a red “bull’s eye” rash at the site of the tick bite that appears about 7 days after being bitten. Flu-like symptoms quickly follow the rash. If not treated, this disease can spread to other parts of the body and cause symptoms such as arthritis and loss of facial muscle tone (Bell’s palsy). Lyme disease can be fatal.
Coprophagia is the ingestion by a dog of feces, either its own or those of another dog or animal. It can be caused by medical conditions such as exocrine pancreatic insufficiency, overfeeding, or malabsorption. It can also be a behavioral problem characterized by attention-seeking, reinforcement, or as a learned behavior. Numerous health problems can arise from this activity, including internal parasites or infection with canine parvovirus or toxoplasmosis. Treatment includes behavioral modification therapy or altering the feces to affect its taste.[163]
Jump up ^ Reynolds, Cecily A.; Bain, Perry J.; Latimer, Kenneth S. “Canine and Feline Cryptococcosis”. College of Veterinary Medicine at the University of Georgia. Archived from the original on 2006-09-11. Retrieved 2006-11-27.
Melanomas* account for four to six percent of skin tumors in dogs and are usually benign. They are the second most common tumor of the toe and are malignant in this location. Malignant melanoma is also a common oral tumor in dogs. Malignant tumors most commonly spread to the lymph nodes and lungs.[161]
Nutritious mass-market food abounds, says Linda Case, author of Dog Food Logic, but some of the best products come from smaller companies that make food in their own US facilities. Sure, you can feed your dog on 15 cents a day, but making the investment in higher-priced food, say at a few dollars a day, can mean the difference between giving your dog chicken and serving it ground chicken heads (yes, gross!). Tip: Grain should not be one of the first two ingredients on the label, and the protein source should be named (“trout” not “fish,” for example). Bonus: Worried about pet-food recalls? Follow the American Veterinary Medical Association on Twitter @AVMARecallWatch or its Facebook page to stay informed.
The Windsor-Essex County Health Unit in southwestern Ontario announced this week it has confirmed infections in two dogs brought to Canada from South Korea by a U.S.-based dog rescue group. Both dogs have the H3N2 strain and their new owners have placed each of them into quarantine, away from other pets.
Newborn puppies receive antibodies from their mothers that help provide immunity, but immunity to CPV wears off before the puppies’ immune systems are developed enough to destroy the virus and fight off infection.
Other diseases affecting dogs include endocrine diseases, immune-mediated diseases, and reproductive diseases. Diabetes mellitus, Cushing’s syndrome, Addison’s disease, and hypothyroidism are the most common endocrine diseases. Immune-mediated hemolytic anemia is a devastating disease that causes severe anemia in dogs through destruction by the immune system. It has been associated with vaccinations and certain drugs, although many cases are idiopathic. A similar but less severe immune disease is immune-mediated thrombocytopenia, characterized by destruction of platelets by the immune system. Clinical signs include bruising and petechiae (pinpoint bruising, often seen in the mouth). Common reproductive diseases include pyometra (distension of the uterus with pus), mammary tumors, and benign prostatic hyperplasia.
For most dogs, insulin injections are necessary for adequate regulation of blood glucose. Once your pet’s individual insulin treatment is established, typically based on weight, you will be shown how to give him his insulin injections at home.
Jump up ^ Grauer, Gregory F. (2002). “Diagnosis and Management of Canine Glomerular Disease”. Proceedings of the 27th World Congress of the World Small Animal Veterinary Association. Retrieved 2007-01-16.
Rarely, Capnocytophaga can spread to people through bites, scratches, or close contact from a dog or cat and cause illness. Most people who have contact with a dog or cat do not become sick. People with weakened immune systems who have difficulty fighting off infections (for example, people with cancer or those taking certain medications such as steroids) are at greater risk of becoming ill.
“He is soooo cute,” you thought when you first laid eyes on your dog. And—yay!—he seemed to like you too. So you brought him home—only to realize that maybe you weren’t totally prepared for the work this relationship involved. Well, your mom was right (again): Owning a dog IS a big responsibility, from training to feeding to keeping it stress-free. “We don’t have that many years with our dogs,” says Whole Dog Journal editor Nancy Kerns. Here’s how to make sure each day is filled with health—and happiness for you both.
Jump up ^ Modiano J, Breen M, Burnett R, Parker H, Inusah S, Thomas R, Avery P, Lindblad-Toh K, Ostrander E, Cutter G, Avery A (2005). “Distinct B-cell and T-cell lymphoproliferative disease prevalence among dog breeds indicates heritable risk”. Cancer Res. 65 (13): 5654–61. doi:10.1158/0008-5472.CAN-04-4613. PMID 15994938.
7. Flea and tick borne diseases: Fleas and ticks are certainly undesirable guests on your pets fur, but they are more than just unwelcome creepy crawlies. These tiny passengers can carry serious diseases that can cause profound illness in both pets and people. Want to keep your cats, dogs, and human family healthy? Use a monthly topical flea and tick preventative, vacuum regularly, and always check your pets and yourself after playing with other animals or in grassy fields.
Mouse and rat poison is commonly found in the house or garage. Dogs readily eat these poisons, which look like small green blocks and are very attractive to them. The poisons work by depleting stores of Vitamin K in the body, without it, blood cannot clot properly. Clinical signs of poisoning include depression, weakness, difficulty breathing, bruising, and bleeding from any part of the body. These clinical signs often take 3 to 4 days to show up. A blood test will show that the blood is not clotting properly. If the poison has only recently been ingested (within 2 to 3 hours), the dog should be given apomorphine or hydrogen peroxide to make it vomit. Activated charcoal can be given to absorb any remaining poison in the gastrointestinal tract. Then the dog is given Vitamin K supplementation for 3 to 4 weeks, depending on the type of poison. At the end of treatment, the clotting times should be tested again. The prognosis is good in these cases. However, if the dog is already showing signs of poisoning, it is too late to try to remove the poison from the body. A whole blood transfusion or plasma is given to treat the anemia and to try to control bleeding. Vitamin K is also given. The prognosis is poor in these cases.
Because parvovirus can live in an environment for months, take extra care if there has been an infected dog in your house or yard. Parvo is resistant to many typical disinfectants and can be difficult to eradicate.
Developmental orthopedic diseases include panosteitis and hypertrophic osteodystrophy. Panosteitis occurs in large and giant breed dogs usually between the age of five and fourteen months and manifests as fever, pain, and shifting leg lameness. Hypertrophic osteodystrophy is also seen in young large and giant breed dogs and is characterized by pain, lameness, fever, and swelling of the long bone metaphysis.
Alabama dog rot was first identified amongst greyhounds in the state of Alabama in the 1980s. After this first flair up, the number of reported cases dwindled and as no clinical research was carried out, the disease was almost relegated to history. Because no one has been able to determine what causes the disease, it is now only recognisable by its collection of clinical symptoms.
Jump up ^ Häggström J, Boswood A, O’Grady M, et al. (2008). “Effect of pimobendan or benazepril hydrochloride on survival times in dogs with congestive heart failure caused by naturally occurring myxomatous mitral valve disease: the QUEST study”. J. Vet. Intern. Med. 22 (5): 1124–35. doi:10.1111/j.1939-1676.2008.0150.x. PMID 18638016.
Rabies (hydrophobia) is a fatal viral disease that can affect any mammal, although the close relationship of dogs with humans makes canine rabies a zoonotic concern. Vaccination of dogs for rabies is commonly required by law. Please see the article dog health for information on this disease in dogs.[1]
I love playing with my family. Running, jumping, swimming: it’s all great. But my favorite is fetch. For some reason, when we play fetch with my Humunga Stache, my family seems to have even more fun than usual. There’s lots of laughing and they take extra pictures of me. I don’t know why, but if it makes them happy, it’s fine with me!
Hydatidosis is caused by a cestode Echinococcus. This is usually noticed among dogs, wild dogs, foxes, etc. Due to its importance as a zoonosis, these worms are important to treat. Preventing hydatidosis is an easier task than treating the same. Anthelmintics such as praziquantel may help prevent this condition. Prohibition of the feeding of dogs with uncooked offals may be the best prophylactic measure against these tapeworms.
^ Jump up to: a b Basso C, Fox PR, Meurs KM, et al. (March 2004). “Arrhythmogenic right ventricular cardiomyopathy causing sudden cardiac death in boxer dogs: a new animal model of human disease”. Circulation. 109 (9): 1180–5. doi:10.1161/01.CIR.0000118494.07530.65. PMID 14993138.
Urinary tract infection*, specifically cystitis or bladder infection, is common in dogs and usually caused by bacteria. Signs include blood in the urine (hematuria), difficulty urinating (dysuria), and frequent urination (polyuria).[154] The most common types of bacteria cultured from the urine of dogs with cystitis are E. coli, Staphylococcus spp., Proteus mirabilis, Streptococcus spp., Klebsiella pneumoniae, Pseudomonas aeruginosa, and Enterobacter spp.[155]

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