Could My Aussie Have The "Lethal White" Gene?

by Hannah
(Tennessee)

The litter that my pup came from when I got him had 9 pups all exactly 5 weeks old, and no mother to be seen. I was looking for a blue eyed blue merle male, and the guy said he had one, but when I got there, it was about 90% white, with little color. There were 3 more the same color. I started not to get one, but I fell in love with a red merle. It was full of color and spunk, so I decided I would save it (since the puppies still needed to be with a mother I felt, and the mother WAS NOT there).

I took it the 4 hours back home and got it some puppy milk for suppliment. Things were great until yesterday when I realized its eye has a eccentric pupil, which is common with the double merles. It also has REALLY long hair, at 6 weeks it is 3 inches long, it was about three times more fuzzy than its litter mates (I don't know if this is a problem with the breeding?) I am taking it to the vet in 2 weeks to get it checked out and shots, but I would like to get advice?

Note from Anton: More information about "Lethal Whites" or Homozygous Merles here.