Been there, done that
From John Scalzi's blog "Whatever":
With the exception of the three or four hours he spent up a tree yesterday, chased there by Kodi after he foolishly ran away from her, thus triggering her hunting reflex, Temp Cat™ is doing fine, as you can see. We still need to canvass the neighborhood to see if anyone’s missing him, but I believe Krissy has already scheduled a vet trip for him for shots, deworming and possible detestefying. I say “possible” because Krissy seems to think he’s been previously snipped; I rather think it’s that he’s not yet hit cat puberty. Either way, we’ll find out. And naturally once we’ve paid for his emasculation, then we own him, because if you’re going to take someone’s balls from him, you pretty much owe him lifetime support.
How could you do any less?