An animal which is irritable or angered is referred to as

An animal that is mad or irritable is called a rabid animal

Ex. There’s a rabid dog and it doesn’t want to calm down
Ex. Rabid bears are dangerous

Agroup of engineering students from purdue university reported that its licking machine, modeled after a human tongue, took an average of 364 licks to get to the center of a tootsie pop. twenty of the group's volunteers assumed the licking challenge-unassisted by machinery-and averaged 252 licks each to the center.