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Cats become diabetic when their blood sugar levels are high for too long; in fact, a normal cat with a healthy pancreas will become diabetic if subjected to intravenous glucose infusions over time. In a more natural setting, the problem is a high-carbohydrate diet rather than an intravenous glucose infusion. When we eat carbohydrates and they enter our bodies, there is a rise in blood sugar level that persists for several hours. In cats, it is more like 8 to 12 hours, even longer if the cat is obese. All this circulating blood sugar stimulates insulin secretion so that all that sugar can be stored in the body. If the cat is snacking on dry food throughout the day, he may be secreting insulin throughout the day as well. This makes for a fat cat and a depleted pancreas.
Obesity makes body tissues more resistant to the effects of insulin so that the pancreas must secrete even more insulin to put away the same amount of circulating sugar if the cat is overweight. While weight loss is reported in 70 percent of diabetic cats, 40% of diabetic cats are obese despite this.
A diabetic cat can become normal if blood sugar levels are returned to normal and kept normal for a long enough time. This cannot usually be done without insulin injections but diet is important as well.
A low-carbohydrate, high protein diet is best. If the cat is overweight, the amount should be tailored to induce weight loss. Kibbled diets require a minimum amount of carbohydrate to produce their shape and consistency but canned foods are not hampered by this carbohydrate limitation. This means that canned food more often fit the bill but there are several therapeutic dry diets made for diabetic cats that your cat may prefer.
Ask your veterinarian which therapeutic diet is best for your diabetic cat.
There are several therapeutic diets designed specifically to meet these guidelines. Ask your veterinarian which one is best for your cat.