It's baby season outside--I suspect hunting is good and they just aren't tempted by supplemental food. In another week or so this year's youngsters should be savvy enough to avoid predators better, so don't give up yet! The cats may show more interest in the fish when hunting is harder.
"We are--each of us--dying; it's how we live in the meantime that makes the difference."
"It's not what you gather, but what you scatter that tells what kind of life you have lived!"
"Be kinder than necessary, for everyone you meet is fighting some kind of battle."