Sweet Pea, the sheep, is an orphan:
She gets sick, and the vet has to come check her over. At last, Sweet Pea is well enough to have a "sheepover!"
You can read more about Sweet Pea and her friends here.
I especially enjoyed the personal note from the authors/farmers:
This book combines fiction and non-fiction in a fun way, and both includes follow-up activities! Also, kids will love this book because of the main characters - especially Sweet Pea, the Sheep - too cute!
