Yes, a "high-value" item like a meaty bone can cause a dog to exhibit some resource guarding. While he's little, and you can handle him, start working on teaching him that you can come near, or even take things away from him when he's eating/chewing. An easy way to start is to "trade" him for something even better than he has.
I think you should start feeding him a set amount, at regular meal times, rather than free feeding as much as he will eat. It's a better way for you to monitor how much is going in.
Rather than focus on his weight, watch his physique. You should be able to feel his ribs easily--not see the ribs, but feel them. Pups should not be roly-poly--they should look like small adults.
I think you should start feeding him a set amount, at regular meal times, rather than free feeding as much as he will eat. It's a better way for you to monitor how much is going in.
Rather than focus on his weight, watch his physique. You should be able to feel his ribs easily--not see the ribs, but feel them. Pups should not be roly-poly--they should look like small adults.