Well it will differ from each bun but as you mentioned it can be intense
I think what I’ve read and witnessed with my own bun is that they take it harder. As far as what to expect, the female bun tends to chill out. My bun was observed to lie down a lot for the first 24 hours. Not really moving or doing much.
I think the biggest concerns is to make sure you keep the digestive track going so eating is a big concern. I tried to leave her alone to recoup but would occasionally feed her wet greens to make sure she had something to eat and some water. As long as you can get her to nibble on stuff that sould be good.
I believe all the tell tale signs of a successful procedure In humans or animals is eating, drinking, pooping and urinating. So once I saw that she was doing all 4 I felt better.
As far as the wound goes you want to check to see that she isn’t licking or biting the area. The vet should show you what it looks like and what to look for.
Finally try to limit her excercise and movement so that she’s not hopping around too much at first