If you mean in publishing order, then Redtail in Into the Wild is the first cat to die. Chronologically, I have no idea.
Yes, Millie dies in the Warrior Cats series. She passes away from old age, peacefully surrounded by her loved ones.
no
Just wherever.
The four cat clans in series one of Warrior Cats are ThunderClan, ShadowClan, WindClan, and RiverClan. ThunderClan is known for its bravery and loyalty, ShadowClan for its cunningness, WindClan for its speed and agility, and RiverClan for its swimming skills and connection to water.
Yes, cat poisoning can kill cats, it was made to actually kill cats.
In the Warrior Cats series, Sasha dies of old age. She is a former rogue cat who becomes the mother of two main characters, Hawkfrost and Mothwing. Sasha lives a long life and passes away peacefully in her sleep.
*!SPOILER ALERT!* No. She later becomes a warrior. Her warrior name is Ivypool.
The clan where warrior cats go when they die is called StarClan. It is a group of the spirits of deceased warriors, leaders, and medicine cats who watch over and guide the living cats of the forest.
When the cats battle.
If you die a cat it can be purple!
Yes. There is no such thing as infinite life, even in the Warriors world. Rock and Fallenleaves (ancient tribe cats) are nothing but spirits that roam the tunnels. When cat do die, they have two paths: The Place of No Stars (dark forest) is home to cats who have commited great injustice in their lives and break the warrior code.. Cats who do injustice or break the warrior code, are sometimes forgiven. ex/ Yellowfang broke a key medicene cat rule by having kits, but she was forgiven, and sent to Starclan. Starclan is where cats who have served their clans to the best of their ability go. I only assume that you were looking for a Warriors related answer, as your question is under that category. If not, then your answer is simple: Of course cats die, they follow the same mortal paths as every other living creature.
One of them is Tallstar. Another one is Pinestar.