Does your cat spend most of the day lounging, only rising to eat or use the litter box? If so, it may be carrying extra weight. Switching foods or cutting portions often isn't enough for effective loss, as a recent University of Illinois study reveals. Researchers focused on healthy weight reduction—targeting fat loss while preserving lean muscle—in inactive neutered male cats, who require ongoing calorie adjustments due to low activity levels. The goal: 1.5% body weight loss per week.
To hit that target, food intake was initially cut by 20% from maintenance levels, with further weekly reductions needed to sustain progress. Key takeaway for owners: commit to consistent portion control to achieve and maintain an ideal body condition score.
The 18-week study also tracked shifts in the cats' fecal microbiota—gut bacteria, fungi, and viruses. As weight dropped, certain bacterial groups increased while others declined, potentially yielding benefits like reduced inflammation.
Expecting more pep in their step, researchers monitored voluntary activity in eight neutered males housed together in a large room (20-22 hours daily), fitted with collar monitors to track running, playing, and climbing. "Their activity level didn't change much," a researcher noted. "Towards the end they got a little more active, but not statistically." Still, experts urge owners to boost movement through interactive play and relocating food bowls.
