Poor Nebo and poor you too. I know how hard it is because I had a similar time with Bob when he was neutered. He didn`t come home with a collar on but the first night I couldn`t sleep for his constant licking, I hit on the bright idea of putting a muzzle on him, a big leather greyhound kind and that worked in a way. He couldn`t lick but he also couldn`t settle, whine, walk about, on and on. I slept downstairs on the couch, whine, walk about, nudge, paw... I gave up. Next day he was so sore and swollen after all that licking and he would not let me bathe it, snarling etc. Ok, called the vet and took him in, said he was ok advised to bathe it etc and they gave me a collar, took him home and put it on. We were in the hall at the time, and thats where he stayed, sat there, in the same spot, hardly moving a muscle for TWO hours! I tried tempting him with treats and sweet words, nothing. Tried ignoring him, went in the living room and watched some tv, stepped over him and came upstairs on the computer. Nothing, just stayed there looking at me with hate in his eyes. Of course I took it off.
The rest of the time until he had his stitches out was so stressful, he eventually stopped licking so much and eventually the swelling did go down and I managed to bathe it once with out losing my hand! He did bite one day though, I was taking him out for his walk and the lead sort of tangled around his rear end, I lifted his leg to untangle him and he got my thumb. It wasn`t deep or anything but it did hurt and it was scary. He was so nasty. For a little time there it was hit and miss whether he`d go on a one way trip. But he was still my Bob, and here he stayed.
I have read and heard of lots of dogs having the op with no trouble, just the other week Simpson, who lives next door had it done and he was ok. Why Bob reacted the way he did I really don`t know.
So I really, really, hope Nebo has got used to having the collar on by now so he can heal up properly. Please let us know. Prayers and thoughts going out for you.