I've got dog sh*t like engraved into the uggs pattern of my uggs...help!!!?

I am fourteen by the way, and I have no idea how to get out of the soles of the uggs. It's like in every crack and it's like embedded deep into the "uggs" soles and ughh!!! The sh*t is like engraved into the uggs pattern on the bottom ewww. I'm gagging just thinking about it and I'm gettin' this really bad taste in my mouth just think--ugh.. How can I get it off?