Have any of the keepers ever been injured by an animal?

Have any of the keepers ever been injured by an animal?

Yes, zookeepers have been injured. It's just one of the things that happens if you work as a zookeeper. You do get occasional bites here and there. I myself was bitten by a gorilla and had to go to casualty, but that was my own mistake and the gorilla did it because I sort of started him and actually slipped against some mesh when the gorilla was on the other side. So the gorilla sort of bit my hand through the mesh, but that's just what a gorilla will do. So yes, it can be a hazardous job working as a zookeeper.