User blog comment:FairyRaven/Fairy Tail Chapter 337: The Golden Plains, Review and Commentary/@comment-33019320-20130628101647/@comment-7418318-20130628103907

Me too. Also why a PINK frog costume of all things?

And there are plenty of reasons why an Exceed could have gotten killed. For example people who got defeated by Rogue and killed Rogue's best friend as revenge, monsters like the Vulcan who thought Frosch is a nice snack, cat-haters and sadists in general, or it might even have been an accident, like a strayshot that was meant to hit Rogue. Rogue said Frosch was killed, he doesn't specifically say he/she/it was murdered after all.