I Think He Wants 'em Back

So, a post-surgery update.  Cooper is really awful.  His behavior sucks big time since the surgery.  My biggest beef is with the nipping, especially when he is hyper.  I've mentioned some of the things I've tried, like a can full of coins, spray bottle of various noxious liquids, and even a dog whistle.  All of these things except the whistle make him MORE hyper.  The whistle stops him, for moment.  He's usually not calm enough still to command to sit.

Ugh. I'm very discouraged.  I'm not a quitter, and its not like that's an option, but I want this "phase" to be over with.  I wonder if this is a male dog thing?  Individual personality? None of our females were like this.