The sciatic nerve is often affected in cases of slipped disc. It's the longest nerve in the body and runs from the back of the pelvis, through the buttocks, and down both legs to the feet. If pressure is placed on the sciatic nerve (sciatica), it can cause mild to severe pain in the leg, hip or buttocks. Not all slipped discs cause symptoms such as pain, weakness or tingling. Many people will go their whole life not knowing they have slipped a disc. Read more about the symptoms of a slipped disc.
When the cats decide to try hunting in groups Owl Feather says that they won't be practicing with her kits and she expresses worry that one of the strong birds would get her kits. Owl Feather lays next to Shy Fawn, it is noted that Shy Fawn's belly is very swollen, and that her kits will come soon.
As a young warrior, Stonefur fights in the battle against ThunderClan over Sunningrocks, and is pinned down by Redtail, but is freed by Oakheart. Oakheart warns Redtail that no ThunderClan cat shall ever harm that warrior before Oakheart dies.