I took the dog to his vet for a follow up checkup.  The vet confirmed from the xrays that the stones were back in his bladder and he would have to have surgery to have them removed. The vet believes that it is struvite stones.  The surgery will cost approximately $1300.  This is the second time that we’ve had this procedure performed.  The last time was in 2004.  I wonder if there is a way to have the stones dissolved to prevent him from going under again.  I’ve read several articles about remedies to have the stones dissolved so they can be passed but not sure if they work.  My next step is to schedule the surgery.