Thai, my Tonkinese

This is my youngest baby of the furry four legged. I have had cats all my life and I can honestly say he is by far the most needy, demanding cat I have ever owned! He demands complete attention, gets jealous of anything else that takes this away from him, be it other cats, snakes, lizards, or children. But aside from all this is my baby! He's like a special needs child that even though he requires more work he just has that special place in your heart!
This is a picture of when we first got him:



And this is one from today:



He has changed color so much from when we first got him that he doesn't even look like the same cat. I'm curious if any other tonkinese owners have seen such drastic changes