So, I couldn't remember what Fred and George's Patronus's were, so I googled it, Fred's was a Hyena, George's is a Coyote, but I also read that after Fred died, George could've changed his Patronus to a Hyena but we don't know because he was never able to produce another Patronus, how can you when all your happiest memories contain your dead twin brother
Yes Fred died. And almost everyone in the world cried. He was killed by Bellatrix, who in turn was killed by Molly Weasley after Bellatrix tried to throw a killing curse at Ginny. One of Molly's most epic lines was right there in that scene too.
Bella - *throwing curses left and right, laughing like a loon* *narrowly misses Ginny* *starts to attack Ginny*