Maubach Ranch guarantees all puppies to be free from genetic defect for 3 years. We offer a 30 day health guarantee. The guarantee is for a replacement puppy. This is the industry standard. That being said, a "replacement" puppy is not going to cure the heart ache of a "defective" puppy. This is why we leave no stone unturned when it comes to our breeding program. Health testing, strict vaccinations, worming and top quality diet are just the beginning of what we do to insure that you get a thriving addition to your family. We don't have any "special needs" dogs in our breeding program. Even a dog with food allergies is not a breeding prospect for us. We have built a facility and acres of fenced ground to insure that our breeding dogs are in top condition physically and mentally. Your Maubach Ranch aussie should be a benefit to your family or program, and not a burden. But... once in awhile "mother nature" can throw a curve ball and for that reason we are happy to guarantee our puppies!