OK, so this video barely qualifies as appropriate for this site: but there is a dog in it and it looks like both hunters are using double rifles.
A great looking Beretta, a 16g Winchester M21 with double triggers, a great pigeon gun, and more. See all of these doubles now.
Here 's a great looking vintage OU, and it looks like it could go cheap. Check it out now.
Check out this piece about one of the UK's most notorious game shots.