I had never heard of this specific product, but I the active ingredient, sodium chlorite, is also the active ingredient in Ox-E-Drops LINK. Ox-E-Drops doesn't make any claims re: cures for cancers, but recommends them for people and animals as a bactericide, viricide and fungicide. The site has testimonials as well.
I'm so very sorry about Caesar. I completely understand wanting to try anything to help him. I am major advocate of alternative healing for my dogs and myself. Several years ago I had a dog (non-greyhound) diagnosed with hemangiosarcoma (tumors in her spleen, lungs, and heart) and the specialist gave her 4 to 6 weeks at the time of diagnosis. She wasn't a candidate for chemo or surgery due to her age and a pre-existing heart condition. I explored all manners of alternative options and put together my own treatment regime for her (diet, supplements, herbs, etc.) She actually thrived for a year (no one who saw her thought she could possibly have cancer) and then went into congestive heart failure at age 12. I'm ever so grateful for that year with her. It was truely a gift.