Spike

Spike was a the pet of either Ralph Baker and/or his fiance Sarah in 2077.

Background
Living before the Great War, Spike's owner(s) Ralph Baker and/or his fiance Sarah were designated to live in Vault 114. Unbeknownst to them Spike wasn't to be admitted and they were assigned to the Residency A2 section of the vault. However with Vault 114's unending construction they may not have been there when the bombs hit Boston.

Appearances
Spike is mentioned only in Fallout 4.