Dear Christopher Cat: My veterinarian diagnosed my cat, Kiki, with anemia, and he is doing more tests. What is anemia and what causes it?

Christopher responds: Anemia isn't a disease itself but a characteristic of many disorders. Anemia is defined as an abnormally low number of red blood cells, the cells that carry oxygen throughout the body.

In a recent study of over 30,000 adult cats, 3.6 percent were anemic.

Anemia develops in one of three general ways:

Decreased production of red blood cells by the bone marrow, due to, for example, the feline leukemia virus, feline immunodeficiency virus, chronic kidney disease or ingestion of estrogen in some human skin creams;

Loss of blood, such as from injury, fleas, intestinal parasites or rodenticide exposure; or

Destruction of red blood cells within the body, because of such factors as Mycoplasma bacteria (once called Hemobartonella) or ingestion of toxins such as acetaminophen (Tylenol), onions, garlic or the zinc in sunscreens or pennies.

Further testing should determine the cause of Kiki's anemia, which will guide your veterinarian in treating her.

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Dear Daisy Dog: I read an animal welfare article that stressed the importance of allowing captive animals to express the behaviors that are natural for their species. The article explained what that means for zoo animals, but how does this concept translate to domesticated dogs?

Daisy responds: Domesticated dogs want the opportunity to give and receive love, but those whose ancestors were bred for specific reasons also appreciate doing what their genes compel them to do.

Today's dogs evolved from a wolf-like animal that hunted using seven distinct behaviors. In order, they are orienting toward the prey, visually following the prey, stalking the prey, chasing, using a grab-bite to capture the prey, inflicting the kill-bite and consuming the prey.

Humans developed breeds for specific tasks by disrupting this chain of behaviors at certain places.

For example, pointers assist their gun-bearing handlers by orienting toward, visually following and stalking their prey, but not chasing them. Herding dogs manage their flocks by using all the behaviors through chasing, but they don't grab-bite. Terriers and other dogs bred for rodent control perform all the behaviors through inflicting the kill-bite, but they don't consume their prey.

Many dogs enjoy sporting events designed for their breed. For instance, border collies participate in sheepdog trials, dachshunds in earthdog trials and Irish wolfhounds in lure coursing. Such events improve the quality of life of these dogs by allowing them to exhibit their natural, ancestral behaviors.

Ask the Vet's Pets appears Fridays in the print edition of the Reading Eagle. The animal authors of the column live with Lee Pickett, V.M.D., who practices companion animal medicine. Contact them at www.askthevetspets.com.