What about those Yorkies

I'm not really familiar with Yorkies. I have a 2 yeard old male named Sherlock, and he is 3/4 Chihuahua and 1/4 Corgi. I guess looking for a dog that is no bigger than four pounds, you'd want a Yorkie that is 2 years old or older. Two years is when dogs are officially called "adults." Although with every dog I've had, they all pretty much quit growing after they turned one. I know Yorkies are good apartment dogs, as they only have a need for moderate exercise. And like a Chihuahua, small homes are better for them than they would be for larger dogs. And by larger dogs, I don't mean a German Shepherd. I'm just talking about a rat terrier or something! : )