The creatures in Buckle: Slave & Monster, IHHAT, and World Gates are referred to as Beastials.
In Buckle's case, terms are used the normal way since that is a world mainly comprised of humans and they refer all other mysterious creatures as simply "Monsters". In a way, Buckle is a separate universe but with elements found in IHHAT and World Gates.
World Gates is currently getting ready to be rebooted and will cover some of these topics. IHHAT is more of a spin-off of World Gates, focused on less "world saving" characters. For now, bird based anthros are referred to as Avian-Beastials and are not related to chickens though obviously have high similarities.
Edited at 21/3/2017(Tue)08:28:43