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
Calming down tonight with clear spells and cooler temperatures! Setting us up for a decent start to the weekend!
Callum Williams of Wrexham pleaded guilty to causing grievous bodily harm to the woman police officer, assault and damaging property.
RSPCA says at first they thought the caller had confused the animal with a badger.