NOW is one of the worst brands for supplements and other products.
If you are going to put the Colloidal Silver in your dog's eyes buy one of the pure silver products like companies such as Sovereign Silver, or other companies who produce nothing but pure Colloidal Silver .
JAB was right!! NOW probably has other ingrediants in there that would irritate or be bad for the eyes - they are a horrible company and make lousy products - stay away from them and others like Twin Labs - they are cheap for a reason - they are crap!!
I have 2 cats and have a 2 ounce bottle of Sovereign silver. I am about to put some in my ears for the damned ringing which will not stop and is driving me crazy - I hope it helps. Also, I have put it into my cats' ears, swished around and cleaned them out ....