I bought some dog rocks also; got them at Amazon: http://www.amazon.com/Dog-Rocks-Prevent-Grass-Supply/dp/B000NE2UH4/ref=sr_1_1?s=pet-supplies&ie=UTF8&qid=1372436745&sr=1-1&keywords=dog+rocks.
I haven’t used them yet. I think I’m hesitating since Sam and Bella drink from the same water dish and Sam makes a huge mess out of the water bowl so I’m constantly rinsing and refilling. It’s recommended that you put the rocks in their bowl and top off every evening and rinse the bowl every few days. I think my frequent rinsing and refilling might decrease the effectiveness. Plus, the manufacturer of the rocks recommends feeding a “premium dry dog food and keep the red meat to a minimum.”
