Symptoms of thyroid problems in dogs include vomiting and diarrhea, increased appetite, weight loss, breathing problems and a rapid heart rate, states petMD. If the thyroid gland underproduces certain hormones, the sympt... More » Pets & Animals Pets Dogs

Symptoms of thyroid problems depend on whether the thyroid is overactive or underactive. Hyperthyroidism is characterized by an overactive thyroid, and symptoms include weight loss, heart palpitations, frequent bowel mov... More » Health Conditions & Diseases

Common symptoms of thyroid disease include weight changes, dry skin, fatigue, heart palpitations and constipation, according to WebMD. Other symptoms include menstrual changes in women, tingling in the extremities, cold ... More » Health Pain & Symptoms
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The common symptoms of an overactive thyroid are weight loss, increased appetite, irritability, rapid heart rate and anxiety, according to the Office on Women's Health, whereas underactive thyroid symptoms include weight... More » Health Conditions & Diseases

Symptoms of renal failure in dogs include vomiting, lethargy, diarrhea, constipation, weight loss, increased thirst and acute blindness. Other symptoms include blood in the urine and an increase in the frequency of urina... More » Pets & Animals Pets Dogs

Symptoms of liver disease in dogs vary but include loss of appetite, weight loss, vomiting, diarrhea and stomach ulceration, states Merck Manuals. Fluid build-up in the abdomen, excessive urination and thirst, weakness, ... More » Pets & Animals Pets Veterinary Health

Some symptoms of parasite infestation include diarrhea, fatigue, itchy skin, anxiety problems, sleep disturbances, loss of appetite, weight loss, anemia and muscle and joint complications. The five most common infections... More » Health Conditions & Diseases