It's not a good gutload period, but I wouldn't panic specifically about the "high levels of animal proteins" in a bone shaped dog biscuit, because sadly any biscuit cheap enough for the store to waste on bugs, doubtfully has much if any animal protein in it. Most of those milkbone type biscuits have barely any meat in them. Maybe a little bit of fat for flavour. They're mostly wheat. Which is sad, since they're intended for carnivores. So they probably are more appropriate for the bugs than the dogs they're intended for.