what is bad about white australian shepherds?

my australian shepherd was white when it was born but now it has really faint tan spots. Is it true there is something wrong with this? he's also double merlewe didn't get him from a breeder, our friends have australian shepherds

Take your dog to the vet for a full physical exam. Double merle means both parents were merles and breeders are NOT supposed to breed two merles to each other as there's a MUCH HIGHER RISK of genetic abnormalities, including blindness. If he was mostly white, the question of possible albinism needs to be asked. If his nose has little to no black, he might be an albino. If he has genetic flaws, it may affect how long he will live. You need a vet to check him out carefully to make sure he's in good health. -!-

His color is a result of being a double merle. This is why there is a disqualification for too much white in the coat in the Aussie standard.No reputable breeder will breed two merles together. The double merle is also called the "lethal white" because the vast majority of such pups must be euthanized. Some are born without ears or eyes. Almost all are born with some visual impairment and/or hearing loss. Such dogs require special care: they can't be allowed off leash, ever, they are very hard to train and to communicate with. They often become fearful and defensive, snapping at anyone who comes near.You need to take your pup to the vet for a BAER test on his hearing, and to have his vision evaluated. Ask the vet if there is anyone in your area who has an experience in training a dog handicapped as yours almost certainly is; if you have some help it will be easier. And if the vet recommends you put him down, ask him to explain his reasoning, and take his advice seriously. A deaf and/or blind dog --handicapped so from birth-- is a special needs dog that will always require extra care.