I got one from Amazon (search 'pet camera'), but he didn't like that too much and it was a little too big. He is only 1 year old, so I got a small spy camera from ebay and attach it to his collar. Its super light and he doesnt mind it at all. It takes video constantly and also logs his trail by gps and then I can put the details into google maps and see where he went. I send him on reconnaissance missions and he comes back with the report.

Yeah newtus, you need to train him up a little like kureha suggested