Hi there and welcome to YT
Is London A little guy? How long have you had him? Sometimes, A change to A new home can throw off A Yorkie's Appetite. But, if he has always been this way then I would look into changing his food to a higher quality diet.
In the Health and diet section their is A thread about premium foods and links too. Check it out , it may help you decide what to do.
If London is not A tiny yorkie, and is not showing any signs of ilness then he might be just a picky yorkie. Does he ever eat human food? Because once they do, they develop A prefernce for that. It can be hard to break them off of it too.
I hope you find Yorkie talk helpful , it is full of information and wonderful people.
