Hiya, Christina, and welcome to BYC! 
So sorry about your losses. That is rough, but glad you're into it again with both feet! I hope you fixed it so dogs or predators can't get at them. Like @TwoCrows mentioned the 1/2" hardware cloth, that's about the best thing to use to keep them much safer.

So sorry about your losses. That is rough, but glad you're into it again with both feet! I hope you fixed it so dogs or predators can't get at them. Like @TwoCrows mentioned the 1/2" hardware cloth, that's about the best thing to use to keep them much safer.