I have a cabinet hatcher. It has room for 4 hatching trays that have lids to contain any hatchlings plus there is also a bottom tray that is 4 3/4" deep. None have ever jumped out of that tray. If that isn't enough room to separate all the different kinds I may have hatching at the same time, I have hardware cloth fences that I use to divide the hatching trays into more sections.Unless you screw up and put too many varieties in them, then you need a 3rd for a hatcher!!!