On your new baby! Honestly I would not just let him switch over straight to the other.....there tummies cant take much change at a time. Nothing worse than seeing them act sick and have tummy problems. You should look at the other forum "yorkie health and diet' there is some wonderful info on very good quality foods.
I would take the dry you are wanting him to start on and wet it....then once it is soft mix it in with the canned food...that way it is similar texture but his tummy is getting used to the new stuff...then if he likes the hard crunch of the kibble give him one or 2 of those as a treat. I would just keep adding in a little of the wet/softned kibble every day over the next week before you just give it to him straight.