I would definitely watch him closely ... you don't want him to lick that incision! Might be a good idea to call the vet tomorrow for an E Collar...or buy one at Petsmart.
If you think he is chilly, just put a light t shirt on him. I would not cover him up with a blanket.
He will feel better each day. The first couple of days are the most difficult. I do hope they gave him something for pain.
He is precious!
