can anyone help me with the title of a kids book?

[nicolatwinkle]

i remember this book from when i was quite a bit younger. still in primary school. its about a wolf who eats the baby goats/lambs and falls asleep by a tree. the mummy goat/sheep then opens up the wolfs tummy and takes her babies and fill his tummy full of stones and sows it back up again. i no this sounds like something from a horror movie but can anyone help me out with this. thanks you