blackcob
🖖
Perhaps the breeder thought it was only a minor hernia? Without the vet's notes we don't know what was observed at that point, and it sounds like a couple of days passed between the health check and the OP picking up, and a few days again before going to the OP's vet. I'm not a clinician but I don't think it entirely outside of the realm of possibility that it could have worsened in that time, or even that the second vet just had a different opinion on the severity of it. It's the reaction to the email/subsequent phone call that will be telling, IMO - they've got a chance to do the right thing.