Labs not locking

Question
Hi, I have a 2.5 y/o lab in eustrus and is standing for the male with no problem, but the male is unable to get the right angle to penetrate her, we put her up on blocks to raise her height a little bit, but he is still aiming high. He has already  sired 7 litters. This is my bitch's first time. Thanks

Answer
Sometimes you can help  too much. In my opinion if she's standing and he is experienced,. they'll figure it out given the opportunity. If you want to be positive she gets bred take her to the vet and have her AI'd.. But I bet he gets it done :)
Cindi