How heavy is a wolf cub at born?

It depends entirely on the individual wolf and its age. For the first two weeks of their lives, pups can gain as much as 2.6 pounds per week if they're female and 3.3 pounds per week if they're male. From three weeks to one month of age, they can weigh between 3 to 5 pounds. From 12 weeks of age until they are mature (1-3 years old), they can weigh between 22 to 30 pounds. So you can see there's a whole lot of variation in there.