The Spoilers

First off, these are completely true. They come straight from the book.

Dovekit is, in fact, the fourth apprentice. She is the third cat in the porphecy. She received a dream from Yellowfang. Yellowfang gave her the omen: "After the sharp-eyed jay and the roaring lion, peace will come on dove's gentle wing." Dovekit's power is that she can sense things extraordinarily well. She discovered that beavers were building dams in the streams, causing a shortage of water. She did not ever see the beavers, but she knew what they looked like and what they were doing. Dovekit also knew that Berrynose got a thorn in his pad (or something like that) without even being on the same patrol. Dovekit and Ivykit became apprentices early in the book. Dovepaw's mentor is Lionblaze, and Ivypaw's mentor is Cinderheart.

Other spoilers that do not regard Dovepaw are that Leafpool became a warrior. Jayfeather is now the full medicine cat of ThunderClan. Foxpaw and Icepaw were appointed as warriors, and their names are Foxleap and Icecloud. Toadkit and Rosekit became apprentices. Toadkit's mentor was Cloudtail and Rosekit's was Squirrelflight. By the beginning of the book, they are already warriors. Their names are Toadstep and Rosepetal. Graystripe and Millie's kits also became apprentices. Briarpaw's mentor is Thornclaw. Bumblepelt is being mentored by Mousewhisker. And Hazeltail is mentor to Blossompaw. Poppyfrost is now a queen and is expecting Berrynose's kits.

Firestar also loses a life when he is attacked by a fox. I'm not sure how many lives he has left, but it's certainly not many. Barkface of WindClan finally died, leaving newly named Kestrelflight as the full medicine cat.

Due to the drought, Leopardstar threatens to attack any cat who takes fish from any side of the lake. Rainstorm, a RiverClan warrior, spots Ivypaw investigating a fish, so he lunges at her. But instead, he gets caught in a mud hole, where ThunderClan rescues him. He stays at their camp until he's better. When they take him back to RiverClan, Dovepaw comes along and somehow senses that there is a sick cat in RiverClan, and that Mistyfoot is worried.

Lionblaze and Jayfeather both suspect Dovepaw is the one, and they are correct.

Where i got this from: