beeniesmom,

The previous replies all gave good advice.
However, when I had my dogs spayed the vet used internal sutures which did not need to be removed; they simply dissolved. Also, I know when my dogs were spayed I was told by my vet to make they didn't have any food or water 12 hours before the surgery- since they are both females, they stayed at the clinic all day and stayed the night, but I think it is easier on males.
Just make sure that you listen to your vet's advice when you take your dogs in, as they would be most qualified to answer your questions.

Pembroke_Corgi