On the Bone Ball Bark blog this week we are looking at something in the 'BONE' category; health and nutrition! What are some dangerous foods for dogs? Everyone pretty much knows that chocolate is a big no no to feed your dog, but there are many more toxic substances in everyday human food that your dog should never eat. Here are five foods to ensure your dog avoids at all costs! Grapes Raisins Macadamia nuts Onions Coffee Grapes and raisins are extremely toxic to dogs. A 10lb