Why does my dog kick their back leg when I scratch their tummy?

We have all seen it, and we have probably all had a giggle from it, when you scratch your dog’s tummy and they uncontrollably kick their back leg. But why do they do it? Is it hurting them? Is it mean?

In this video vet-n-pet DIRECT’s resident vet Dr Glenn answers the question why does my dog kick their back leg when I scratch their tummy? Make sure you tune in as the answer and how the reason was scientifically proven many years ago is very interesting (and sad).