This is a question that we often get from sitter and owners who work with Rover. Help the community out by answering them in our forum!
Although Mulch is basically torn up leafs, sticks and compost, I would highly recommend that you do not let your dog eat it. Some types of mulch could have certain toxins in it that could be dangerous/poisonous for dogs. Also, mulch in general can be a choking hazard for dogs which could cause an obstruction. Grab some new dog toys, chews and treats to keep them from eating your yard mulch!