ear tipping question

Good evening ladies and gentlemen:

I am concerned about ear tipping my ferals.

I don't have a "colony" as such, and I don't see most of the cats for
much more than 4 months. There really will be no one here to feed
them when I move away.

Several have not returned after being trapped and fixed.

Under these circumstances should I tip their ears? Will someone see
them in the future and not feed them because they think they are already
being cared for?

Tip - yes or no?

Chelle
"The day may come when the rest of the animal creation may acquire those rights
which never could have been withholden from them but by the hand of tyranny.
The question is not can they REASON, nor can they TALK, but can they SUFFER?"
-- Jeremy Bentham