He should really get that mole looked at.
Lovely cat, and my guess is that the beautiful eyes will pretty much stay as they are.
Isabel’s eyes stayed two colors - I just love her eyes.
As for the kiten food - both of my last kittens (Hanna & Isabel) preferred the adult dry over the kitten food. I don’t know why. It really didn’t seem to affect them in a negative way. Isabel is a small cat, but I think she is just a smaller cat, not a cat that didn’t get enough nutrition. She is full of energy still at 11 months. Hanna is a large cat, so the lack of kitten food didn’t stunt her growth.