So as some of you know, I just bought my second betta the other day and keeping him a secret from my grandmother (who I live with). I've been storing Weezy at my mother's house visiting and feeding him everyday. I change his water every couple of days too. He is very happy to be out of the little cup and is very active.
Well my mother lives out in the woods off a dirt road. I came to visit Weezy yesterday and found a MOTH in his bowl.

I was so upset. My mother insisted that it just flew in there, but what are the odds that a moth would fly directly into my little fish bowl? It made no sense to me. And the worst part was... Weezy had eaten most of the moth's body and part of its wings.

I fed him anyways because I figured he should eat some real food. I only gave him a couple of pellets. I glance at his tummy and it was definately full.
I am almost POSITIVE that one of my little brothers did this because they enjoy destroying anything that I own. However, I am not totally sure. If I find another bug in Weezy's bowl, I will definately pitch a fit. Besides my brothers though, Weezy is in a safe place and I can strike fear in my little brothers I promise you. They will NEVER try to do such again.
My only worry at the moment is that he becomes constipated. What should I do?