Okay, hate to be the grammar nazi but it is MUCH easier to read a post that does not look like a 5 line run-on sentence.  Just a few periods please.
If you look closely in a game with several chicken AI's present the burrow spawn rate is effectively increased.  If you don't believe me try adding about 10 chicken AIs and track the burrow count for a few minutes.
It sounds like you are clamoring for a way to make the chicken game longer with multiple queen waves, right?  You could try a custom game with the queentime near max, burrowqueentime at 0, and an elevated techtimemultiplier (don't go too crazy with this one).