How long did an allosaurus stay with it's mom?

Answer 1

It is unknown whether Allosaurus raised their young or whether the hatchlings immediately fended for themselves. In any case, Allosaurus probably didn't raise their young until adulthood, as juvenile Allosaurus had special adaptations for hunting. Young Allosaurus had proportions different from adults that allowed them to be faster runners. This suggests that they hunted on their own using different strategies from adults. If they were raised by parents, most likely they would have been fed and protected by their mothers.