I wrote about my polka-dotted backyard last spring.................still have it !
I was at a local gardening center last Sunday to buy some Guard Dog. http://www.getmicrosolutions.com/guarddog.html
At the checkout, I asked the gal if she knew of any other products to help. She said that her parents have been giving their dogs plain ol' tomato juice for years and have no yellow spots.........
After some more digging online, I found this statement.....http://www.thepetwellnessclinic.com/guarddog.htm
Anybody know anything about tomato juice and dogs ?? I have Guard Dog spray and will be using that. But if a bit of tomato juice will help prevent the spots in the first place and most importantly will not do the dog harm......why not try it? The Guard Dog is expensive ( $25 for a bottle to treat 500 square feet)