Pine pellets to absorb the smell and pine shaving for nesting material.
Pellets for breeder groups and babies over 2 weeks of age.
Mix of pine pellets and pine shaving for nursing moms with babies under 2 weeks of age.
I have been breeding rats since early 2007 and produce several thousands each year with no side effect.... cause of death in the rat population is always linked to snakes. lol
Some breeders retire at 18 months and they are healthy they just no longer produce enough hence why they are retired.