Dr. Supriya
Hi pyati, it is safe to use tear stain removers in dogs but please check the ingredients present before use . You can use mild boric acid containing cleansers like Trixie eye care solution(topical use only) or coconut oil and aleovera extract based tear stain removers like Petkin jumbo eye wipes.
Don't apply the tear stain remover directly, instead take the solution in a cotton ball then wipe.