Ok question number 2........
In between their balls there's like a hole, now i'm assuming this is their sac thingy, sometimes hay and shavings gets stuck there and Chesters sometimes stinks.
Now i've tried cleaning inside but i cant get very far inside, apparently you are meant to be able to roll it back with your fingers to get right inside the sac?
Plus they create merry hell when i do it. is it hurting ?