Okay I try in English :-)
the Bull goes four Fields free, then up and takes the first block in the upper Whole. Up,Left and walks with the cow ( blue arrow ) down. Cow next right, unter the block up, fetches the keys and takes the block in the whole, then she walks on the bridge. The Bull is going right too, until the end, up, left,over the knob and down to hit the cow again. The cow fetches the last key,goes down too. She hit the bull,he goes up to the last knob.
Okay, i can send you a picture if you will give me your adress
LG
Meg