Now unwanted dogs are being given a second chance to become man's best friend.
A new series from ITV focuses on a training academy in the hills above Bridgend where all different kinds of dogs are put through their paces - learning to sniff out explosives and drugs.
Crufts it is NOT, but the animals and their trainers love the work.
If you're in Wales, you can watch the first episode on ITV tonight at 8pm
More top news
Welcome to the Newsweek Quiz - where we'll be testing your knowledge from the last seven days of news here in Wales.
Ospreys lock Lloyd Peers has joked that a change of name after marrying his wife, could mean better fortunes on the pitch.
Much of Wales is bathed in warm sunshine at the moment, but be warned! It is about to come to an abrupt end overnight!