Wild dogs are aggressive level ~12-13 mobiles, found in various locations around Arda.

A wild dog bares his yellow fangs at you.
>look dog
Snarling fiercely at you, this sinewy dog is one of the few survivors of the
Great Plague of 1636, sweeping from the East-lands of Middle-earth to Eriador
and the Shire. Adapting to the harshness, these beasts have mastered the skills
of stealth and scavenging. His smoke black eyes stare chillingly at you.