My 12-year-old yellow labrador had an operation on his eyelid yesterday, he's usually very lively but he looks so sorry for himself since he came home yesterday evening and was up all night whining (not like him at all). They sent him home with eye drops but no pain relief and I was wondering if there was any kind of natural pain relief I could give him to perk him up a bit? Giving him treats makes him forget about it for about 10 seconds but I can't keep doing that!