Have you tried contacting all the vets as this is probably the first place 'most' decent finders would take him. He has a ring on his leg so he would also have an identifiable number, best you dont give this number out to anyone. Also try putting posters up with his picture in all the supermarkets not just around the area but all over Doha - who knows where he could be now. Also put posters up in vets. Share this post on facebook with dogs in doha, qaws, cats in qatar, asqat, anzaq, how where and how in doha, lost and found in doha etc etc and ask people to share - hope you find him but please get him a bigger cage, this one is for a budgie.