I have a kitten that I adopted a month ago whose mother passed away in an accident. He is a healthy and playful little kitten but it's only a week ago that he started to suck on my shirt and kneed at it as though he were taking milk from his mother. He does this often when I'm lying down and he climbs my stomach and chest and strait to kneed and suckle on my shirt. He does this on my blanket as well or on anywhere he feels warm. I often catch him suckling on my sleeve or collar when I'm asleep. I feel bad because he probably misses his mother so I tried to give him warm milk in a squeezable food color bottle but he refuses. I've tried countless of times to try and use this solution but it was no use. I have also read that a by the age of 5-6 weeks old, a mother cat would train her kittens to not suck from her teets anymore. I'm wondering why its only since a week ago that he has been doing this to my shirt. I don't think it is the milk he is after. I think he does it to pacify himself even if he is already calm. What should I do and how do a change his habit?