A cat's hair can fall out in patches because of hyperthyroidism, ringworm, compulsive grooming, cortisone excess, mange and feline endocrine apopecia, according to WebMD. Feline hair loss is referred to as alopecia and can be partial or complete, according to PetMD. Alopecia also occurs in older cats with cancer and skin allergies. WebMD notes that cat hair loss often makes the coat coarse, brittle or greasy.
Ringworm is a fungal infection that causes cat hair loss, according to WebMD. This condition results in the cat's hair falling out in patches of one-half to two inches across, often with a red ring at the periphery. The skin is often scaly and crusty. Hyperthyroidism — excess thyroid hormone — can cause hair loss in about one-third of cats with the condition. Feline endocrine alopecia is the thinning or balding of the coat on the inside of the back legs. This occurs in neutered males and spayed females. Cortisone excess causes a symmetrical hair loss over both sides of the cat's body, often with a darkening of the skin. Cortisone excess is a likely result of a thyroid problem.
Veterinarians can diagnose the reason for the hair loss, says PetMD. Blood tests, X-rays and muscle biopsies can help determine the cause.Learn More
WebMD states that there are several diseases that can cause a dog's hair to fall out in chunks, such as growth hormone-responsive alopecia, hyperestrogenism and hypothyroidism, which are all hormone-related. Non-hormone-related diseases for hair loss in dogs include acanthosis nigricans, which mostly affects dachshunds, as well as color mutant alopecia, demodectic mange, pressure sores and ringworm.Full Answer >
Cats land on their feet after a fall due to their reflexes and instincts. As a cat is falling, it is able to sense which way its body should face and correct its position. The cat then arches its back and positions its arms and legs under its body.Full Answer >
Leaves fall off an azalea either because of seasonal changes or because the plant is inconsistently watered or excessively fertilized. Deciduous azaleas normally drop their leaves in the fall, and leaves that drop in the summer usually indicate that the plant is in distress.Full Answer >
A cat that chews on plastic objects such as grocery bags and bottle caps has most likely developed a condition called pica, which causes unusual cravings for nonfood items, according to WebMD. Pica can develop for many reasons, including gastrointestinal issues and dental disease. "Cats may also chew plastic due to anxiety," says Dr. Amy Pike, DVM, of Veterinary Behavior Consultations in St. Louis, Mo.Full Answer >