Quick question.... Is your litter wet???? And how much ventilation does it have.. Overly wet litter will cause high ammonia. What kind of bedding are you using??? Is it absorbent. You are going to want to use a bedding that can absorb the moisture. I think of you can figure out the ventilation and moisture components you will be fine. But be safe cause strong ammonia can make the girls sick. Good luck!!! A starter is a good idea!!! Keep us updated.
I use pine shavings for the litter, and it is completely dry. I turn it every few days with a pitchfork and add scratch grains to it so the girls keep it stirred up very well