This is mostly a problem in large tribes. Groups of creatures are set apart by their gem color, but then with so many creatures to manage you forget about changing the youngest creatures' gems to the right color and all the groups start running into each other. I think creatures should be able to inherit gem color from their parents, to help with organization of tribes so that the gatherers don't mix with the fighters, the creatures being bred for an achievement not mixing with the rest of the tribe, etc.
Thanks for reading my suggestion.
