Campaigners for animal rights are tonight backing calls to ban electric shock collars, used to train dogs and cats.
The devices, which are freely on sale, are said to cause pain, fear and distress to the animals instead of rewarding them for good behaviour.
But the people who make, sell and use the collars say they are a valuable training aid that can help to control dogs when they are distracted or at a distance from the owner.
Click below to watch a report by ITV News reporter David Johns on the pros and cons
What do you think about using electric collars to train dogs?