[Pup-e-Love]

We've given Reesie a couple of bully sticks and he did great with them. Yesterday I gave him a different brand bully stick and when we reached down to get it he snarled and growled and snapped at us like he was going to take our arm off. I know they can get aggressive with real food stuff, but he did so well with the first two I gave him I thought we were going to be okay. He does not do this with his food, or anything else just the bully stick. I took it away from him and did not give it back to him. I'm not sure how to handle this. I want him to be able to chew on something that is good for him, but I do not want to have to worry about the kids being around him when he has the bully stick. What should I do?