Need help finding book ….

It’s a children’s book. It’s about zoo animals. One specific story is about a mama lion and her two cubs. The cubs were chewing the mom’s tail and it was hurting her, so the zookeepers put medication on the tail and separated the mama lion and her cubs by putting a gate. The cubs started to cry. So the mama lion put her tail between the bars so the cubs could still bite and play with it.