Two stories in one book by Enid Blyton:
The Children at Green Meadow-The three children at Green Meadow love animals but they haven't  any of their own-until they are given a secret to look after. Then other problem pets begin to arrive, and soon Green Meadows turns into an animal house.......
More adventures on Willow Farm-Willow Farm is a wonderful home for Rory, Benjy, Penny and Sheila. It's hard work at times, with cows to milk, horses to look after, eggs to collect and lambs and chickens to feed, but all the children agree they've never been happier...........