[anonymously]

“Get him to the vet and get XRAYS”
Yes, I agree. My dog had frequent utis, they responded to the antibiotics but kept coming back. They were being caused by stones. He ended up at the emergency vet, x-rays/ultrasounds revealed stones and he had emergency surgery as this can be a life threatening condition.

I would not skip the x-rays if your vet recommends them.