Personally I think children shouldn't have homework, but they do in order to prepare themselves for tests. They have tests in order to be smarter for the world they will be released into when they come to be of a certain age. 18

There is two solutions to that situation. I would advise you to take the dog to the vet to be careful. Either, its something wrong with him or hes just chewing on it. But, yes, I would advise you to take him/her to the vet to get checked just in case.