My lab thinks that the coal hod on the side of the hearth filled with pellets are a buffet of treats. I walked past the stove and noticed pellet crumbs on the floor and a very guilty looking pooch in his bed 10 feet away. Stupid question but is the makeup of pellets wood and only wood? Is this just like a dog chewing on a stick outside? Dont want him getting sick all over the house. I'm trying to stock up for the winter and the damn dog is eating them.