Could I add some veggies/fruit?

I have tomatoes, carrots, and bananas.

I was thinking of chopping up the fish real fine anyways. I don't think they'd eat a big filet if I handed it to them right away.


As for feeding chicken, can I feed just regular chicken breasts (I have those) or should I wait and buy chicken legs? I was thinking chicken breasts would be better to start with?