3 points I learned about caring for an 8 month old kitten/cat:
1) Do not take your eyes off them EVER

Halaluya
Until he knows for SURE where home is which for now he doesnt.
This shouldnt be a prob as Buddy follows me 100% indoors and outside. Had the people not interfered, he would have come home BUT I can no longer take chances at least for now.
We go out together and in together. For a few months more at least.
2) Breakaway colars are GREAT but get an ALL WHITE or light color and write your address and/or phone all round so it is viewed always most easily without the person taking off the collar. Cause people do not read collars. They see collars which is good and know it is someones cat tho.
Do not use a standard collar as they can easily get hung up and choke. Buddy's breakaway collar stayed on all 4 days.
3) If they get lost dont ASSuME they are out having fun. My little guy really was having no fun from the time he first was picked up and transplanted.
It may have done him good but had he not found food or someone contacted me he might have had probs. A hungry little lost guy like him will show up usually at someones house with lots of people outside and just hang around and meow.
So putting up flyers is the best thing and allows some home owner to contact you and get rid of the noisy lil cat who is suddenly hanging around.