So you don't know and base it solely on what you determine to be overcrowded.
Didn't want that answer because I don't trust my judgement skills with ants. What I'd probably consider overcrowded, I'd imagine others would say is "normal" for them to crawl over one another in tunnels.
Edit:
Will workers start to get..testy.. with one another? Is that even a behavior of ants - to attack their own?
Edited by sgheaton, April 5 2017 - 6:58 AM.