Yep, he is older than 6 weeks. Can you get a shot of his whole body? I'd guess Old English Game of some sort, maybe a cross? Not a breed I'm very familiar with - those are a bantam breed, which mean they are smaller than regular size chickens. Most people keep them outdoors. People who do keep them in the house often put chicken diapers on them. The mess is just too much otherwise, as I'm sure you are finding out! You can keep him outside and just try and get him into a cage or dog kennel of some sort at night.