My pup has a small umbilical hernia. I am wondering if this is something that I should be concerned with if I decide to breed him?

I have 3 of your training video's and really enjoy them. I do not have a training question but a breeding question. I have just acquired an 8 week old breed quality shiloh shepherd male puppy who has an umbilical hernia. I am not a vet nor an experienced breeder so when getting the pup the breeder told me he had one but that her vet was not concerned about it. I am not either as it is small (smaller than a dime). But my question is whether that eliminates him from the breeding pool. I have done much research and find the vets say one thing and the breeders generally say another thing. My breeder said "since it did not occur in any other litter mates" she is not concerned. This was a repeat breeding and it did not occur in that litter either. She said he was first born and mom pulled on the umbilical cord a bit hard. I am asking you as an experienced breeder if in your opinion this is a reason not to breed him genetically speaking? I wanted to stay out of the 'shiloh' world at this point to get an objective opinion.

Thanks for your time,
Lisa