Originally Posted by B3rnie

Your vet needs to do more research I'm afraid, tracing is basically a rabbit playing dead to try to make the predator think they are dead so leaves them alone. A rabbits heart rate more than triples before they become tranced.
Have a look here Tips for handling your rabbit. I have written an article explaining how to burrito a bunny which is the best way to trim nails with a difficult bun (it takes time for both you and the rabbit to get used to so don't expect to just be able to wrap him in a towel straight away).

I can guarantee he is bored just by his behaviour, single rabbits make do with what they have. It has been scientifically proven that a single rabbit will only repeat 3 to 4 different behaviours, where as a rabbit in company will express many, many more.
You don't have to match size when it comes to bonding, you have to match personalities. A good friend of mine had a nethie bonded in with a conti, and the nethie was the boss, I have 2 nethies with a dwarf lop and a dutch cross (1.6kg) bonded with a 3.8kg german lop.
Once he is bonded with a friend I will guarantee you will see an instant improvement