But this study makes me think maybe I should - or at the very least feed canned food more often to make sure they get enough meat.
The one cat that got loose his first week here is the only interested in going outside. Once we got him back, we made sure to keep him confined for several weeks. He's since gotten out a few times, but now he knows this is his home and he doesn't spend more than a night outside. But he will run from window to window chasing the squirrels - and the first time we let him onto the screened porch, he dashed full tilt at a squirrel before he discovered the screen was there. Now he just spends most of his time on the porch, watching the birds and outside critters. He was an owner surrender when my friend's daughter adopted him, then she couldn't keep him and we adopted him, so I don't think he spent much time outside.
The other two cats are Sabra, who was found as a kitten, and Maya who was an adult when she was rescued and had a litter of kittens. But Maya seems less interested in the wildlife than the other two. I think Maya knows she has it good, plus she is a year older and having been a mother, more sedate.