Shih Tzu's 30 warts have been excised by electro-surgery
Channel: Dr David Sing
Date: 2016-02-25

This veterinary educational video shows that multiple skin warts in an old dog are best excised as they irritated the dog and get infected. In this case, the owner had the warts removed and the dog is much happier. 

Many old dogs do have a few warts but this old dog had more than 30 warts. Skin warts are caused by the papillomavirus and usually appear during old age in dogs.