2 years inside before/after
This is Goopy! (Legal name Rufus but that only lasted a few days) We left food outside for about 6 months before finally bringing him inside and getting him fixed. He was a trooper to make it out there as long as he did!
Goopy hasn't had any teeth since he showed up in our backyard, and had a gnarly wound on his neck that left a huge chunk of skin hanging off his face when we finally decided it was time to bring him in before it was too late. Turns out he is FIV+ which explains the teeth. Luckily there is no risk to our other calico cat, Pepper, since he doesn't have any teeth to bite her with!
I consider him a spiritual successor to my childhood black cat Whiskers, who died a few months before Goopy showed up. They both have the calmest demeanors, and I'm glad he showed up when he did.