My three-year old male has been feeding consistantly on p/k small rats weekly (except when shedding), with the occasional mouse when the store is out of rats. He had a four month fast last winter when I first got him, but I finally got him to eat in March of this year, and he has not missed a meal since. He's in an approriately sized tub, all his numbers are good, nothing's changed.

On Monday he refused his rat. Normally, he has it all wrapped up before I even get the lid back on, but this time he just poked his head out of his hide, inspected it briefly, and went back in.

On Wednesday, he passed a big hard nugget of urates(presumably). It looked a white rock, or a small hen's egg. It was probably slightly wider than his body at the vent. I can palpate another slightly smaller hard oblong mass about an inch cranial to his vent. This object does not show up on x-rays (I work at a dog & cat vet, so I took some yesterday out of curiosity and because snakes look so freaking cool on x-rays).

He is otherwise alert, active, inquisitive, etc. His normal self, except for the refusing food thing.

Is this something I should have him seen by a herp vet for, or does it happen from time to time? His previous urates have been soft, as have my other babies'.