I have been researching this problem and the information I have come up with is that tear staining can be a result of several things. One of the theories talks about the presence of bacterial or yeast infection- the yeast infection is called Ptyrosporin or Red Yeast which causes a deep reddish -brown stain. Low grade bacterial infections in the tear ducts are also common and may cause excess tearing and staining.
The action of this product that I have found is said to take place by tying up circulating porphyins- a compoound that reacts with light to produce the reddish stain. THe ingredients of this product is supposed to prevent the dog from contracting Ptyrosporin and bacterial infections which causes excess tearing and staining.
The over the counter product that advertises this product is called Angels Eyes. (There is also another similar product called Angels' Glow but I did not choose that one because it contains dye in it!) Angels Eyes does not contain dyes or wheat products and is sprinkled in the food- therefore is a systemic treatment rather then the thousands of topical agents out there on the market that I have found to be totally useless. Results are said to occur anywhere between 3 to 5 weeks as the old stained hair is slowly cut off as new hair grown in.
But I am not a vet, a chemist or knowledgeable enough about the biology of bacteria and yeast infections to be able to analize or comment on these type of products. Is there any one out there that does understand thiese actions and knows whether these products are truly safe?
In any event, I have sent for his product out of desparation- so I do not know whether it works.
My vet has been less than helpful with this issue.
Is there anyone out there with other information? I am aware of the other theories about food colorings, teething issues related to tear staining, other teeth or gum problems causing excess tearing and genes. But what is there that can be done besides the obvious notion that one should eliminate any food that contains dyes?
Thanks for you help!
PS I am thrilled to have found this forum!!!!!!!!