What do you mean even me? Lol. More than half a dozen decent dog men have been on here backing up my thoughts. All of these start their dogs young as I do, and have had success, as I have had.
I aren't asking you for advice jeemes, nor is anyone else.
Nobody said run a pup into the ground, and giving a sturdy 4-5 month old pup 2 piddly runs on rabbits is certainly not running it into the ground. Surely even you can grasp that?