Bum rubbers...

[MochaDun]

As in horses that rub their bums vigorously against their stable doors/walls...look what can happen

http://www.horseandhound.co.uk/news/397/302229.html

I can easily believe it as the earth and the wood certainly moves when mine gets going at the front of the stable. Against the breeze block wall at the back is fine.

 

[Slinkyunicorn]

Thats the sort of damage my cob would do with her bum.......

 

[Trinity Fox]

EEK !!!!! i am not surprised though the whole pace moves when ours rub their big bums. It kind of puts you off all those lovely thoughts about having stables attatched to your house i must say.