You should ABSOLUTELY let the breeder know ASAP. If they are as responsible as you say they are, they will want to know that a dog they bred has such serious and debilitating issues and consider how that should affect their future breeding plans. I don't know if the breeder owns both the bitch and the stud, but if she used an outside dog, she should also let the stud owner know. You should also report these issues in the Poodle Health Registry so others doing their health checking in future can see what breeders/kennels have produced what issues and can be informed when speaking to a breeder. Health issues can crop up, even in dogs that come from generations of health tested lines, but it is how the breeder responds to it that is important. If you didn't have the money to have surgery, this dog would be crippled for life from a young age.