My Tiger Shovelnose occasionaly eats mice that my snakes refuse, as does my gar.
When my TSN was 6" he ate a 5" Clown Knifefish. He was like a seesaw rocking with his huge belly! hehe
My fish love random bugs from the house, a green tree frog, and a few times I've given them some of my eggs because they kept staring at me while I ate my breakfast.
Everyone can do what they want but I could not feed a frog to my animals.
Their numbers are dwindling here in the UK and they need saving, not using as a food item.