Thanks @ThtRandmWarriorsFan for the last fact!
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-When Leafstar attempted to escape the Twoleg nest, she tried to get out through the chimney first.

-Tigerstar's spoiled attitude as a kit came from the nursery queens. They spoiled him a lot because they were happy he survived.

-Originally, Silverstream was going to survive but her kits would not.

-Swiftpaw and Brightheart were both originally going to survive but be scarred horribly.

-(Some may already know this) The cats that gave Bramblestar his nine lives (in order) are: Firestar, Goldenflower, Bluestar, Mousefur, Lionheart, Ferncloud, Cinderpelt, Feathertail, and Ravenpaw.