My Maltipoo developed a bladder stone, but with the help of our vet and prescription dog food, it has now almost dissipated. Literature indicates that the prescription dog food should not be used on a long-term basis. In hopes that the bladder stone will not re-occur I am thinking that some non-prescription dog foods might have preventative properties such that future bladder stones will be less likely. If anybody has any information or suggestions as to this, I would certainly appreciate hearing of it. Thank you in advance.