It's not quite a problem with Spike yet, but now that he's turned three and fully grown up, he's developing a bit of an attitude problem with other male dogs, especially bully breeds and German Shepherds. (He is neutered, but he isn't called Spare-Pair Spike for nothing - the older he gets the more of a dominant macho bastard he becomes) He's fine if he's off-lead himself, but he can be a touch snarky when he's leashed.

Not entirely sure what to do about it, other than telling him "no" and removing him.