Cleo going under the knife

Cleo is being spayed tomorrow. The same nil per mouth applies to her as to humans - no food after 10pm tonight. That's going to be interesting!
Cleo has always vacuumed up everything in sight, the result of being a rescue puppy with its accompanying fear of starvation. After months of devoted attention from us and access to all kinds of food, she is learning to hold back and refrain from snatching. She knows the pecking order here with hand-fed titbits and is happy to be third in line. But the problem is she doesn't confine herself to food. She has always eaten just about any kind of plant from the petals to the roots. This has been alleviated by feeding her vegetables. So I'll have to keep her inside in case she eats a stick before her operation. But again, we have to run the gauntlet of the driveway, where the guineafowl gather each morning, and what is her favourite snack? Guineafowl poop! Aargh! Do you think it will matter if she manages to sneak some in? I think only her breath will suffer and that will certainly give the vet something to think about!