What should I do if my dog's eyes sometimes get red and watery?
Keep the eyes clean. Redness is a sign of inflammation, whilst wateriness can be a result of irritation, and so an allergy or dust irritation would be top of the list of possibilities. With this in mind review what you use around the dog, and stop using any aerosols such as air fresheners, deodorants, hairsprays, or perfume in the vicinity of the dog.