Water consumption depends on soooo many things, please do not restrict his access to water even though he is drinking an awful lot. Hopefully the vet will run some tests on him to ensure he is a-ok.
Don't be upset that he is a bigger yorkie, lots of YT members have bigger yorkies. Just more to love. His growth is going to slow way down once he hits 6 months anyway.
Hope the vets visit goes well.
__________________ Indy, Benjamin and Malachi   There is no psychiatrist in the world like a puppy licking your face- Ben Williams |