when my layla (GREAT NAME
) was spayed she also came home the same night... she was VERY out of it... had to have help to stand up to pee... it was so sad... but each day she got a bit better.. she was a lot smaller than your layla at the time and it took a few days to wear off.. make sure you buy her a onesie to put on after to keep her from getting at the stitches... i made sure i was up every few hours to check on her... but she was just fine.. needed to just sleep it off... let us know how it goes.. i'll be thinking of your Layla