Personally, I'm happier when my yorkies are porky. Not fat but I see these teeny tiny babies and they are soooooo fraile and some sickly. My preference would be 6-10 or even more. I like to see breeding for standard but I'd gladly take that porky oooopsie over the runt. Just my preference. Don't get me wrong teensy babies are gorgeous but I have teens so I'd be scared. Love your porker, but make sure the vet says its an ok weight for him. My sisters yorkie rescue is 13 pounds. He's tall skinny and perfect. Just a big boy!!! Healthiest dog out of the 4 yorkies in our family