If you can live with the eye watering, room clearing farts and getting your foot stepped on, Boxers are amazing creatures.
might be able to offer some advise in 2 out of the 3!
Eye watering - 1)entropion? 2)ectropion? 3)both? or 4)neither?
1,2,3 seek out canine eye specialist in your area. There are corrective eye sugergies, a little nip & tuck. I had a Golden that had a touch of both & finally broke down & did the surgery, was so glad I did. Some regular vets might also do it, but could leave some scarring due to their lack of experience. #4 contact - allergies - (indoor & outdoor) & what they're eating. I feed my dogs a raw, natural diet & this same Golden, 10 minutes after eating certain greens, the faucet was turned on!
Farts - what are you feeding? Poor or average quality dog foods are much harder to digest resulting in gas. Do you soak dry food 15 min. before feeding, regardless of the dog's age? (Hint it's starting to break down before entering the dog's system, making it more digestible). Change dog food or add probiotics, kefir or yogurt. Had a Rottie, when his farts got bad, it was a sign he needed to see the doggie chiro! The Vegas nerve, which we also have, has a big deal to do with digestion, if pressure is being put on that nerve due to the dog being out of adjustment, that's the result - leave the room, open the windows, turn on the fan!