Jag does fine with other dogs, but Chester can only handle one new dog at a time, and he does NOT like large dogs. So far he's only come across one larger dog that he liked, and that was a BC mix. Otherwise he's absolutely terrified, and if he's cornered with either jump into my arms, or, if that's not possible, snarl. It's a work in progress, but I don't like taking him anywhere where there will be larger dogs without an easy way to distract him and/or take him out to cool down and regroup.