Beep the Sheep

Beep is a little confused. As the only sheep on the farm, she doesn't quite know what sound to make. Every morning, mimicking the tractor's horn, Beep greets Farmer Paul not with a 'baa' but a 'beep'! But Beep doesn't feel that this sound is quite right for her, so she sets off to gather different noises from all the animals. How about a 'neigh'? Maybe a 'moo' will do?