Hi! From what you’ve said, I‘d suggest that its very much adolescent behaviour, he‘s trying to push the boundaries but you need to talk control now otherwise he‘s going to end up getting the upper hand. Firstly, I wouldn’t allow him on the sofa at all until he‘s learnt to behave himself, my dog spends a lot of time on the sofa BUT, its a privilege and he has to get down when I ask him to. I taught Humphrey by putting treats on the floor and giving a command (off) and hand signal when he jumped off to get the treat - as he started to get the idea, I‘d give him the command followed by the treat and eventually I could leave out the treats altogether. If you’re sitting on the sofa and he tries to get up, put your hand out to stop him and only allow him on when he’s quiet and not jumping around. (We respect the dogs‘ quiet place, i.e. their beds, they need to respect ours too!
I personally would also try to avoid either telling him off of trying to get hold of him when he‘s racing about as I think it just makes the situation worse, he treats it all as a big game. I would try to completely ignore him, turn your back and don‘t speak or even look at him, go out of the room if necessary but every reaction on your part just fuels the behaviour. Cockers are by nature excitable, so my tactic has always been to try at least (not always successful admittedly) to stay as quiet and calm but also authoritative and consistant as possible. „Zoomies“ and ‚a mad five minutes“ are pretty normal but biting and jumping up and wanting constant attention are, for me anyway, not acceptable and if left uncontrolled now will be harder to deal with later.
- one last thought, its a good idea to start and teach a „go to your bed/ blanket/ box or whatver which you can use when visitors arrive or when the doorbell rings or you‘re on the phone etc.