Good With Dogs:⬛⬛⬛⬜⬜⬜⬜
The main problem with getting a puppy at the age you got him at is that he did not have enough time to learn from his litter mates what is called bite inhibition. What bite inhibition is, is the way a puppy learns how hard he/she can play/nibble on their litter mates or mother until they get a negative reaction. When a puppy is properly socialized with bite inhibition by his/her litter mates and mother; the puppy learns quite quickly how to assess bite inhibition with you and other people. But because your puppy has not learned this, you've run the risk of having a dog with no bite inhibition. That is extremely dangerous as he is already showing aggressive tendencies at 9 weeks old. The best thing is to first and foremost, socialize your puppy. Get him to get in contact with as many dogs as you can. I try to strive for my puppies to meet 30 new dogs a month. Whether that be at the pet stores, dog parks, or even in my neighborhood. I will even stop while driving, ask them if my dog can meet theirs if they are walking down the street; pull over and let them meet. Then, contact your local positive reinforcement dog trainer and set your pup up for puppy classes a.s.a.p. Working with creating a bond and curbing the aggressive biting is key to helping your pup learn bite inhibition.
No, it is not rare. The blue-eyes gene in the Australian Shepherd breed of dog comes from the Merle and White Trim gene of the breed. It just simply means that the dam and sire of the litter of puppies both had one or both recessive genes and they came out in the litter of puppies that was produced.
If your dog is experiencing one or multiple seizures; it is time for you to take your dog to the vet. It could be a genetic reason, or it could be that your dog has a brain tumor or even epilepsy. Your vet is the only one you should be discussing treatment with for your dog. Your dog may need to be on anti-seizure medication for the rest of his/her life; or he/she may even need surgery. Again, this is only something your vet can answer for you.
It can take up to 2 years for dogs to loose all of their puppy fur and get the shaggy look of the classic Australian Shepherd. However, if you are worried it is best to ask your breeder for contacts of previous puppies. Contact those puppy owners and ask them how long it took their dogs to get the classic shaggy fur. You can also speak to a professional groomer about your dogs fur if you bring him in for them to look.