walboknls1,
I'm guessing they could (don't have any cats myself). The only person I know that has them both is George in north Texas. Hoping he will comment....interestingly, George is trying to get rid of his cats, I think, in part because he loves the HSB so much.
The cats might compete for the same artificial feed with the HSB...big cats might be able to outcompete for those pellets, but I would think if fish of about the same size, the HSB will hold their own around the feeders. They are so fast, about the fastest swimming fresh water fish I have ever seen.
