When you take everything away it actually makes it worse. Allow him to have a collection of his obsession and set limits on how much he can have. Allow him to earn more for proper behavior. And teach him when he reaches his item limit he can trade out old ones for new ones. When he takes without asking have him return it, wait, then ask for the item. At first the wait time is very short but gradually increase the wait time. Teach him people are allowed to say no and then help him find a way to fill the need. This is not an easy or quick process. It took us a long time to get Logan to ask before taking and even longer to accept it when someone says no. We still have hoarding food problems and it is not due to hunger because we've even had problems with him eating so much he gets sick. It does help Logan to stop hoarding food when he helps in the kitchen by cooking or even do dishes(Logan is very good at cleaning in the kitchen). Also we found that physical activity decreased his urges. Logan runs 5ks, bikes and enjoys the Wii so when he seems extremely persistent with getting something we send him running, biking or to the Wii. Hope this helps some.

Its things that interest him, we bought him a cd player, cd's he loves all kinds of music, he likes to act like he is on the phone so his sister gave him her old phone, his medication one of the side effect is hunger, I give him plenty to eat before he goes to bed, he take things and hide them under the bed, I asked him why and he said he didn't know. His doctor said in his mind he sees something he likes so he takes it, my fear is if he does it out in public so far nothing like that has ever happen, he goes to a day program in the day time, he does very well there,I we always tell him if you want something just let us know,

Stay on top of him and keep encouraging him to ask if he wants anything. Be consistent

hording is the right answer, the only thing he has in his room is his bed, he has a built in bookcase and he hides things there also, I have a lock on his closet,
I try and keep him busy when he comes home, he likes to watch me cook so he gets his chair and sit and watch me cook. I try and keep him out of his sisters way, he has 4 sisters my baby girl is 11 and the both of them are always at it. his doctor says he is 24 but his mind is that of a child.

Many children with ASD have problems with hording. Do you think that is what he is doing? My son is a horder and we have worked very hard with him to stop it. He is only allowed as much as will fit into a designated area and he must ask before taking. He is much better now but still has what can only be described as impulses that make him desire objects. Food is one of his. I try to keep him busy and always insist that he asks first.