Golden Retriever post surgery fho ,trouble eating

Well, today is another day and another worry. He hardly ate yesterday, and he was not eating or drinking at all today. So, I made up a concoction of 1 cup of dry food, 1/2 cup of cooked rice, and 1/2 cup of cooked hamburger.. He ate every last drop! I was very excited so I did it again later on in the evening and he ate that too.
I used a spray bottle and misted his mouth during the day to stimulate him to drink, and that seemed to work pretty well too.
He is still going to the curb for wanting a car ride, so I may have to try it out tomorrow for a while.
He went up and down the stairs today pretty darn good. I had to rush to keep up while holding his towel,lol.
We walked a little farther today, mostly because he wanted to.He's a people person and if he sees people (which he did) it gives him that little oomph that he needed anyways.
I've been walking him on a short leash when outside and today I tried putting him on his long yard leash. Boy, was that a good idea! He obviously didn't like being walked around to go to the bathroom. He had alot of defacating to do, that he must have been holding in.
I worried about him tripping on the leash, but he did real good. A little cross legged at times. But able to squat using his leg muscle to do his duties.
Still icing etc...