Many dog owners in my world are concerned about every warning they receive via newsletters, articles, blogs, and not concerned about some things I think they ought to be. For instance there’s a naturally occurring substance called oxalate which is found in many foods. In combination with a genetic predisposition, excretion of calcium through urine, and some other issues, this can cause calcium oxalate bladder stones – but, it’s not likely unless you have a breed known for these stones. Foods that are high in oxalate also happen to be high in remarkable anti-oxidants and phytochemicals.