American Cats Are Too Fat — But This Diet Can Help

Fat cats may make the internet a merrier place, but it comes at the expense of their own health.

Nearly 60 percent of American cats may be overweight or obese, according to a 2016 survey by the Association for Pet Obesity Prevention, and this excess weight can lead to a number of health problems (including diabetes, skeletal stress and reduced life expectancy) that are reversible with weight loss.



But if you’ve tried to get your house cat to shed a few pounds, you’ll know how challenging it can be. [10 Weird Cat Behaviors Explained By Science]

Indeed, one common feline health challenge is that house cats don’t get much exercise, and a one-time reduction to kitty’s daily diet might not go far enough to improve its health, according to a new study published in the February 2018 edition of the American Journal of Veterinary Research.

In the study, researchers from the University of Illinois tested a new feline diet that reduced the body weight of eight overweight cats to healthy levels over the course of 18 weeks by gradually reducing each cat’s food intake for eight consecutive weeks.

“The intent with this diet was a healthy weight loss: getting rid of fat while maintaining lean mass,” study author Kelly Swanson, a professor of animal and nutritional sciencesat the University of Illinois, said in a statement. “The risk with rapid weight loss, especially in a cat, is hepatic lipidosis. The body releases too much fat, and the liver gets bogged down… We targeted a 1.5 percent body weight loss per week, which falls in line with the range (0.5-2 percent per week) suggested by the American Animal Hospital Association.”

The eight participating cats — all neutered males — lived together in a large room for the duration of the study, only returning to their individual cages at feeding time. Researchers monitored each cat’s health closely. They looked specifically at body weight, physical activity, gut bacteria, blood biochemistry and “body condition score” (BCS), which was measured on a 9-point scale. An animal with a high BCS of 8 or 9 might look “like a little blimp,” Swanson said, and animals with a low BCS could be emaciated and malnourished. The cats began the study with an average BCS of 7.5 (ranging from 6 to 9), which researchers aimed to bring down to an “ideal” BCS of 5.

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