The little guy just swallowed a piece of wet cardboard (thin cardboard from a tissue box). I think it was maybe an inch long, definitely less than an inch wide. I'm worried that's going to impact in his digestive system. Should I worry? What do I do, other than watch him? It was a few minutes ago now, he doesn't seem affected (crop not even swollen or anything), but he's so small. It'd be like a human swallowing a piece of cardboard the size of printer paper.