Quote Originally Posted by tomfromtheshade View Post
I built a rack with medium size litter pans as tubs.

They're 16" x 12" x 4".

They work just fine for me.
Its important that you pick a tub that is short enough for the small rats to get up into the food. They will watch the mother eat and they will follow her lead. They will wean faster and grow faster when they can reach the food.