I used straight pine pellet with breeders and babies over 2 weeks old, nursing mother with babies under 2 weeks old get 50/50.
The wood shaving are not kiln dried this is what I use http://www.tractorsupply.com/tractor...cu-ft--5027706 I pay $4.99 per bail.
And for pine pellet I use this http://www.tractorsupply.com/equine-...40-lb--2181006 or equine pine and I pay $5.99 per bag (A little goes a long way)