A cat’s head can shake or tremble due to tremors, which are a symptom of an underlying health problem. Tremors occur when the muscles contract and relax involuntarily and repetitively. Tremors in cats can be caused by nu... More »

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According to PetMD, mange in cats manifests itself as small hairless patches on the head, particularly around the eyelids, as well as hair loss on the neck and flank. The bare patches of skin may display scaling, red les... More »

Excitement, old age, pain and nausea are all causes of trembling in dogs, according to WebMD. Trembling or shivering may be a sign of something serious, such as an injury, kidney disease or poisoning. More »

www.reference.com Pets & Animals Pets Veterinary Health

Dogs may shiver or tremble for many reasons, including pain, poisoning or kidney disease, according to WebMD. Dogs may also shiver due to seizures or other neurological conditions. More »

www.reference.com Pets & Animals Pets Veterinary Health

If a dog consumes a large amount of a toxic type of chocolate, the result can be a racing heart rate, heart arrhythmia, tremors, seizures or even death. The type and amount consumed determines the dog's reaction. More »

www.reference.com Pets & Animals Pets Veterinary Health

Common symptoms of poisoning in dogs include vomiting, diarrhea, excessive thirst and urination, sudden onset of muscle tremors or seizures, and weakness or lethargy. Poison generally affects a dog's kidneys, liver and b... More »

www.reference.com Pets & Animals Pets Veterinary Health

Just like a human being, a cat may vomit if it eats food too fast, engages in vigorous activity soon after eating or it experiences health complications, according to WebMD. If your cat shows other symptoms like dullness... More »

www.reference.com Pets & Animals Pets Veterinary Health