- You might also be looking for the HMS Beagle or the SS Beagle.
Porthos, a dog
The Beagle is a breed of domesticated dog, most likely originating from England, on Earth.
During the 22nd century, Captain Jonathan Archer owned a Beagle named Porthos, which he took with him during his time on Enterprise. (ENT: "Broken Bow")
In the alternate reality caused by Nero's temporal incursion, Montgomery Scott attempted to prove his theories about interplanetary teleportation by beaming Admiral Archer's prize beagle. The dog was never seen again. (Star Trek)