Your moms goldfish are probably eaten by raccoons, not cats...... I had fish in my back yard for a while too - the raccoons made a huge mess of everything and I had to give up.

I have strictly indoor cats (for their safety and welfare) but I too have had indoor outdoor cats in the past and the best they were ever able to do were tiny mice. I never had a cat who was a successful bird hunter. Do I think no cats can do it - of course not, but I certainly don't think house cats can be pinned with the disappearance of birds..... Chemicals - specifically DDT (think Silent Spring) nearly destroyed bird populations and they are just beginning to make a comeback. I've noticed a huge increase in the numbers and species of birds even just in my neighborhood in the past 10 years. We had only pigeons, house wrens, finches and starlings when I moved here. Since that time I've seen eagles, peregrins, flickers, scrub jays, owls, bush tits, oregon juncos (in the winter) and many more.

In any case the OP was complaining about a stupid *human*, not even a dog or a cat...