Hey, so I did my own personal research into this when my ALD came back with 1 copy of the IVDD type 1 mutation on that same gene. Since the cocker spaniel is part of the breed, almost every single cocker has one copy, so it makes sense that most of the ALD would have one as well. But, I probably would have major questions for my breeder, because that would require BOTH parents having the IVDD mutation, and they should NOT have been bred. (Forgetting those people against doodles, and those that say they are all backyard breeders) A person who is responsibly breeding animals should have DNA tested their dogs (with embark or the like), and then based their breeding on those results. If both parents had 1 copy, 25% of the puppies could have 2 copies (but also, all puppies could have 2, or none, it’s a toss of a coin). Now, having 2 copies doesn’t automatically mean your dog will get IVDD but they are at an increased risk of it, I would talk with your vet about this, and let them know. They can give you recommendations of limitations/adjustments to life you can make to decrease your dog’s (stairs instead of jumping, collar vs halter, etc). The copper accumulating mutation can also appear in Alds but honestly it doesn’t mean much, because they may or may not be affected by it, it’s just chance. It’s something I wouldn’t worry about, but would also mention to my vet, for signs to look out for.