curdog
A cur — A working or sheepdog
archaic
(Meaning the Foxe) will serve, my sheepe to gather And drive to follow after their Belwether.
Thereto right well this Curdog by my coste
Where it comes from
From Middle English cur-dogge, kurdogge, curredogge, equivalent to cur + dog.
Adapted from the Wiktionary entry curdog (CC BY-SA 4.0).