The lack of genetic diversity caused by inbreeding greatly increases the likelihood that recessive genes, which cause debilitating afflictions, will be passed along to puppies. As a result, roughly one in four purebred dogs suffers from serious congenital defects, such as hypothyroidism, epilepsy, cataracts, allergies, heart disease and hip dysplasia - a disease that can lead to crippling, lameness and painful arthritis.
Many people will be horrified to learn that underneath the glossy veneer of the UK's biggest beauty pageant for dogs, lies the ugly fact that the way some of our favourite breeds of dog have been bred to look, can cause them chronic discomfort, pain and suffering throughout their lives and can even lead to their premature or painful deaths.
If you can keep your dog in sight at all time, be aware of what they are doing and be confident your dog will come back to you promptly when you call, then there is no need to put them on a lead. But if you can not be confident they will return when you call, then a lead is the safest option for everyone.