We just adopted a second dog who is a female. We have a male dog which we adopted 3 years ago. He's used to having free access to all of his toys (he's a spoiled brat). I read that when you introduce a second dog, you should remove all toys and slowly introduce new toys to each dog. So far, we have taken away all toys except today we just introduced each dog to a toy. Each dog is very possessive about their new toy. If one dog shows interest in the other dogs toy, the other other dog will be aggressive. They both do this to each other.
For now, because the recently adopted dog has only been in our house for a few days, we take all toys away unless we are supervising the dogs. I'm wondering if it's possible for the dogs to learn to share their toys in the future, or is this a behavior that needs to be trained? If so, how should we go about training them to share their toys? We would ultimately like to leave their toys out again as we did with our first dog, so they can have things to chew on when ever they get the urge.