Thanks @2BullyMama. I went ahead and got the donut. At first he was afraid of it until I finally caught him to install it around his neck. Funny thing was he wasn't moving at all. Like he was scared to move coz he might die or something lol
He is slowly getting around the house and almost back to his old self. Appetite is definitely back to normal and I'm back to his training routine this afternoon. This morning, he was still too sleepy to do anything else.
The incision is not bad and not that big. He is not allowed to jump or be too active. Have to keep him calm. So far he is doing really great for his 2nd day.