Our 11-week-old working Cocker puppy keeps attacking us. He lives in a play pen in the kitchen when we're not training/playing with him. Sometimes, either when we let him out the play pen or after a while of playing (on his own or with a tug toy) in the living room, he'll go completely hyper and start biting.
Today, when my husband let him out of the play pen, he bit me and my husband constantly for about 30 minutes. He wouldn't be distracted onto tug toys, refused to train or obey commands, and kept biting my feet and legs. He wasn't nipping - he was actually trying to chew me.
My husband had to physically restrain him because he was attacking me so relentlessly that I had to jump onto a chair to escape him. He was leaping up at me and tearing at my clothes and legs.
When I removed my socks, I had small bleeding cuts all over my feet and knees. I was puppy yelping at him (which normally causes him to stop), standing still, etc. It just made his behaviour worse.
When he wasn't biting me, he was pelting about doing endless laps of the room, and flinging himself manically onto things. He's got about three days before we can take him out for a walk on lead (had second set of vacs last Thursday)
We're doing the 'off' exercises in the forum biting advice (our puppy class trainer told us to do them), but once he gets into a mood like that, I could beam him into space and he wouldn't take any notice.
Is this normal puppy behaviour or is biting frenziedly a sign there's something wrong with him?
I'm scared he's got 'Cocker rage'