I have a white Shih Tzu named Teddy and under his eyes are always stained. The only time they disappear is when he is groomed and the discoloration is cut. I have been using Betta Bridges Natural Tear Stain Remover for a couple of weeks. If you use it every day you will see a difference within a week. I take a soft cloth and put a little remover on it and gently wipe under his eyes. I even do his paws because he is always grooming himself and his saliva makes his paws turn slightly brown. His paws also are starting to get lighter!! What a great product.
I love the fact that Betta Bridges is a US made, cruelty-free, fragrance free, palm and coconut oil based solution. It is very gentle on his eyes. I will continue to use everyday so my Teddy has no stains under his eyes and paws.