I've heard of food allergies causing a number of different things, so an ear infection is not far out there. There are plenty of good grain free food choices out there as well. I feed my guy grain free also.
As far as the tearing, I am somewhat battling the same thing. Once in a while he gets a tear or two, but no staining. What I've heard from others on here is it could be an ingrown eyelash that needs to simply be plucked. Maybe that's the case with your guy. I'm sure more experienced.members will come in with more info.
Welcome to the site by the way!!
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