Both eyes are using the same material setup. You will have to use the grouping tool or other software to add a new texture. That means modifying the base eye mesh. Takes about two minutes. Made me think about the Hivewire Dog that ships with Poser. Did the same thing to him. Would be suitable for a husky. Prof of concept only here as no dog that I know of has red eyes. I just wanted to check using something with different eye mapping.