hi every one sparky had not passed any in over a month. then today he passed some most seemed gritty and some came out like a pebble along with a fair amount of pee. i know he is well hydrated as he gets a soak every other day and has water available all the time. also he didn't eat much yesterday not sure if that was a coincidence or not. he ate right afterwards. i do sprinkle calcium dust on his food a couple times a week. did i do some thing wrong or is it a common thing? a couple pics if it helps.

