The breeding period of the red pika is from April to September (or extended to October), with 1 to 3 litters per year, with 1 to 13 litters per litter. The gestation period of the red pika is about 23 to 24 days, and the lactation period is 21 days.

Newly born red pika allThe body is hairless, the back is dark gray, the abdomen is red, the eyes are not open, the ear holes are not open, and the incisors have erupted, and the weight is 7.6-9.7 grams. The red pika will grow thin and soft on the 3rd day after birth. Silk-like cilia, on the 5th day, the red pika's fur was darkened and light brown, and it was able to crawl but was unstable, and its weight had reached 12.71-18.73 grams. The red pika has opened eyes 7 to 8 days after birth, the ears are slightly open, can stand and walk, weighs 17.1 to 26.1 grams, and runs around in 10 days. Start with wheat seedlings or fresh alfalfa.