Thanks
We just went to the vet to get him vaccinated and dewormed and I realized I made a mistake about the weight. Actually, it's almost 9.5 lbs (4.25kg).
About the marking, does it stop after a while or will he just keep doing it?
I agree about the cookies, he should stop eating them. Don't think it'll stop, though. Even the vet said his coat may be the way it is because of his diet.