[K.S.H]

As the title says,
Molly, our two year old Yorkie cross had an operation on Wed, she was speyed and had rear dew claws removed as they were growing inwards and bothering her, she was quiet on Wed night but after that she was back to normal, running around, jumping on and off furniture, play fighting with Max Etc.
We were told to keep her calm and not to over do things but its impossible, we just can't stop her, doesn't seem to be in any pain at all and the wounds aren't bothering her.
Do they not feel the same pain as we do? sure we don't run about like that after an operation, especially if you had 3 wounds.
They seem to have healed already too, still a bit red on her legs but her stomach there's hardly any sign of a cut, the reddest bit is were the stitches are.