enormously by tying to put up an electric fence across their paddock. One twanged the tape I was trying to tauten repeatedly with her front hoof while the other bit chunks off the plastic spool and they both entangled themselves repeatedly in the tape. After saying 'No!' firmly and to no effect, I gave up.It was like trying to work with two hyperactive toddlers who wanted to be involved in what I was doing. Bless them, it gave them a lot of fun anyway!