How to introduce WeChat to sell dogs?

I have never sold a dog, but I have a few. Let me tell you something about the buyer's mentality. I'm afraid of dog dealers who sell in bulk. I met two dogs. They bought them in bulk, and soon after they came back, they got tiny canine distemper. Second, I am afraid that my bones have problems and I will grow up with deformed lower back and legs. Guarantee these two points, the others are not important. Real dog owners don't care how much money they have.