1. Look at the carapace: The female characteristics of the young Brazilian red-eared turtle are not obvious, and one part that is easy to judge is the shape of the carapace. Generally speaking, the carapace of male tortoise is wide and short, while that of female tortoise is long and narrow. This characteristic is also obvious in childhood, so breeders can observe it carefully.

2. Look at the front paws: The length of the front paws can also distinguish between male and female in the infancy of Brazilian tortoises. Generally speaking, the front paws of male tortoises are relatively long, while those of female tortoises are relatively short.

3. Look at the release hole: The Brazilian tortoise in its infancy can also distinguish between male and female by the position of the release hole. Under normal circumstances, the release hole of the male tortoise is close to the tail, while the release hole of the female tortoise is close to the abdominal armor.

4. Look at the belly armour: Brazilian tortoises can also observe their belly armour if they want to distinguish between male and female. The belly armour of female tortoises is generally flat, while that of male tortoises is sunken, which is for the convenience of mating in adulthood.

Young Brazilian tortoises can be raised together because they are small in size and do not need too much space. Moreover, the Brazilian tortoises in their infancy are not particularly fierce, and there will not be too much conflict when they are raised together. But when they mature, they need to be raised separately or the ratio of male to female should be adjusted.