Dogs do have the tendency to bite and eat everything and anything that they find. However, in the case of hats, dogs are not likely to eat it if they find it nice and cozy around their head. But if it is uncomfortable, they are likely to put it away from themselves and possibly try to cause harm to it so that you never try to put it on them again. In addition, you must train themselves that they are not to bite or eat anything that they see.\r