I have no pity for whatever animal gets slayed if it's to prevent breakouts of dangerous viruses/bacteria. Doesn't matter which part of the world it is. The consequences of breakouts can and will be catastrophic.
In Western culture, dogs are seen as valuable companions, aka pets. But in many Eastern cultures, dogs and cats alike are nothing more than livestock, and are eaten.
I'm going to tell you a story. In 2002 I visited my homeland, China and was invited to a dinner by my uncle and aunt. The main dish was puppy stew. My uncle and I were brought to the back where I had to choose a dog for my eating pleasures. Most of them were puppies from 1-3 years old for their tenderness. I picked a black one and 15 minutes later a waiter placed a stew of meat on our table. It had probably 10 pieces of meat along with other ingredients. It was the best stew i've ever had, ever! The meat had a natural distinct taste to it and it was good.
Don't get me wrong, I love pets, but I also like good eats. I own a cat and a dog and would never eat my own. But I personally have no problems eating them, I really don't. In the end, they're just animals like cow, pigs, and chicken.
Many Westerners get the misconception that Eastern people tend to be more cruel and cold blooded due to these practices, but try to think of them as cultural differences instead.