YOU CAN CERTAINLY TRANSITION HIM TO DRY FOOD AT ANY TIME NOW. JUST BE SURE THAT YOU MAKE THE CHANGE GRADUALLY OVER 5-7 DAYS. THERE SEEMS TO BE A TRENDY MOVE TOWARD "GRAIN FREE" FOOD OVER THE LAST COUPLE YEARS. PERSONALLY I DO NOT THINK IT IS A BIG DEAL EXCEPT POSSIBLY FOR THOSE ADULT DOGS WITH ALLERGY TO A GRAIN. CERTAINLY CANINES, ALTHOUGH THEY HISTORICALLY INGEST A LOT OF MEAT THEY NEVER REALLY HAVE BEEN TRUE CARNIVORES BUT RATHER OMNIVORES.
SO FAR AS THE TEAR STAIN PROBLEM IT IS ASSOCIATED WITH GENETIC PREDISPOSITION RELATED TO THE pH OR ACID LEVEL IN THE TEAR. I DON'T FEEL THAT GRAIN OR MEAT DIET IS A FACTOR. USING DISTILLED WATER WILL NOT HAVE ANY EFFECT. ANGEL EYES CONTAINS A LOW LEVEL OF THE ANTIBIOTIC TYLAN WHICH ACTUALLY DOES CHANGE THE pH OF THE TEAR AND CAN BE QUITE EFFECTIVE. IF YOUR PUPPY ALREADY HAS TEAR STAIN IT CAN TAKE A COUPLE MONTHS OF CONTINUOUS USE BEFORE YOU SEE THE BENEFIT.