Ella was spayed quite recently around a month ago, we got her a 18 month babygrow for her, she didn't seem to bother with her little scar, she was very sleepy for the first day, but she woke up almost normal, a good tip the vet said, for the next week treat her as if she's drunk, so watch everything she does.
The hardest thing was stopping the jumping up and down on the sofa,chair,bed,
Side effects, she's eating a lot lot better, her temperament is the same and generally she's had no real side effects