Re: colony

[Elizabeth]

If you choose to breed them the "natural" way then you will get it--they
will reproduce naturally (ie, mostly unchecked--yes siblings and parents
will eventually begin to breed), and die naturally (ie they will fight
over territory, some will be killed, and so on..)

So I really suggest you separate them out into single sex groups.
(Except your breeding pair, if you still want pups)

Elizabeth