Hmmm..7 to 10 days...we don't think so!!!!
Does this vet have cats of his/her own? Do they realize that days are actually hours in a cat's mind?

Pippin slept for about 7 hours after his neuter and then was performing Pip-flips after his nap.

So who's the "kitty wrangler" you've called in to keep them down for 7-10 days???