Tear staining in puppies is usually from teething, and should clear up naturally.
If it doesn’t go away after adult teeth come in it could mean blocked tear ducts. One of my dogs has it but it’s not worth doing the corrective procedure since it works only 50% of the time. Angel eyes will not stop the staining if tear ducts are the problem.
I used a natural tear staining kit on mine as puppies, and did what USA Dog Treats advised and it helped a lot.
http://www.castlebaths.com/spa-products-for-your-pet/tear-stain-remover.html
A change from mineral water to distilled water can help some dogs, as well as good probiotics. I alternate between Mercola and Jarrow Pet Probiotics. Also a few times a week give a few dropper-fulls of plain organic kefir and yogurt. Giving by dropper helps keep their faces clean 🙂
