Glad to hear Maggie is home and feeling somewhat better! I just saw this thread today and I'm sorry I missed it. I know how terrifying it is to leave them overnight...As much as you tell the vet, "call me, call me, call me, anytime" it's such a scary experience to leave them there and not have them in your safe embrace.
Duncan used to eat sticks when he was younger and ended up in the hospital once for it also. That and he would pull burrs out of his tail himself and accidentally swallowed some.
I'm really happy to hear she is home and no surgery was needed! I'm sorry her fanny hurts her. Can you put some preparation H on it? The vet had we do that for Duncan when he was feeling under the weather.

Maggie, stop eating stuff and scaring your Mom!!