Kangaroo the sniffing gains much information from smell cues. This behaviour enforces social cohesion without consequent aggression. During mutual sniffing, if one kangaroo is smaller, it will hold its body closer to the ground and its head will quiver, which serves as a possible form of submission. Greetings between males and females are common, with larger males being the most involved in meeting females. Most other non-antagonistic behaviour occurs between mothers and their young. Mother and young reinforce their bond though grooming. A mother will groom her young during or after it is suckling. A joey will nuzzle its mother's pouch
Kangaroo rat in a short time, perhaps to ensure greater chances of producing offspring. Mating in banner-tailed kangaroo rats involve more chasing and foot drumming in the male before the females allows him to mate. Banner-tailed kangaroo rats mate on mounds and the more successful males chase away rival males. The gestation period of kangaroo rats lasts 22–27 days. The young are born in a fur-lined nest in the burrows. They are born blind and hairless. For the first week, young Merriam kangaroo rats crawl, and develop their hind legs in their second or third week. At this time, the young become