music: Eagles: Don Felder was added as the fifth Eagle on what album?

Questions

Carnivorous animals will not eat another animal that has been hit by a ---------- strike.?

Cats have over ---------- vocal sounds, while dogs only have about ten.?

---------- are the only mammals that are retro-mingent (they pee backwards).?

Cattle are the only mammals that are retro-mingent (they pee---------- ).?

Certain ---------- emit a light so penetrating that it can pass through flesh and wood.?