
Many dungeons have critters in them, and dealing damage to them will generate rage for Warriors and Druids, making them usefull "rage batteries" (if there are multiple rage-users, just remember that the tank has priority). Unlike mobs, critters do not yield experience nor loot (with the exception of Giant Marsh Frog and Dig Rat).
Priests can use Shadow Word: Pain to test critter reactions, as it has a delay before it does actual damage. Some critters, such as the rats in Deadmines and the Deeprun Tram, the Biletoads in Wailing Caverns, or Frogs (no, really!) will strike back at an attacker if the attack doesn't immediately kill them. Most will run in fear if they survive the first attack. Critters are (mostly) harmless and low level. Squirrels, which are among the smaller critters, have eight hit points.
Many larger critters, such as deer and sheep, have one hit point.Size is a poor indication of relative robustness.Some critters have a few hit points and will survive a weak attack.Many critters have just one hit point and always die when hit by a damaging attack.Any 'attack' that causes no damage will not kill a critter.