i have a 3.13 rats and the 2 females have pups. but the other 8 arent breeding with the males. ive had them for about 2 months already. the 2 nursing moms werent bred by my males. i bought them and i thought they were just fat but less than 2 weeks they dropped pups. how can i get my females to breed with the males? i put them in tubs that are 1.2 or 1.3. help please.

thank you

raymond