My pond is 40 years old and 15 acres. I bought it almost two years ago, and started feeding in just one area. The blue gill definitely figured it out, and the ones I catch in that area are probably 30% larger on average than those caught in other areas of the pond. I have two bass (out of how many thousand in a pond that size) that come eat. I've never seen any cats eating but they might stay deeper where I can't see them.