A check chain are an excellent training tool. They should not harm your dog in any way when used correctly.
A check chain works on a jerk and release motion and distributes pressure equally around the neck region. Pet One Check Chain’s are made with Durable high quality chrome plated steel and comes in many different sizes to suit your dog.
Check chains should never be left on your dog while unsupervised. Check chains should always sit loose around your dog's neck.
For a right fit, your dog's chain should measure 5-10cm longer than the circumference of your dogs neck. A rough guide is an extra 5cm for small dogs and 10cm extra for large dogs.