Are the eyes the only thing affected? Does she chew her feet? Lick her bum?
Lots of things can cause allergies.
If its environmental, wiping her feet with ins enter baby wipes every time she comes inside can reduce the allergens she may lick off
If its a food allergy, you need to do a true food elimination diet. Pick a food with a very novel protein, and grain free. That has to be the ONLY thing she eats for at least 8-12 weeks. The ONLY thing. No treats, now chew bones, no people food.
I would also start her on a fish oil supplement with Onega 3 and 6 fatty acids. They have anti inflammatory properties.
The Vet can do a blood test and send it to Heska to check for allergies to common environmental things. But you may need to go to a Dermatologist.
I would clean her eyes multiple time a day with a warm water wipe.
And get those drops in her eyes. If you give her a treat after each time she may get better about letting you do it. But the treat should be of the kibble you chose for the elimination diet.
Good luck
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