Brotherhood of Steel is non-canon, and other prominent examples are unique exceptions (High-level End or Penultimate Bosses) to the rule belonging to high-tech factions (Frank Horrigan, The Lieutenant,) with access to experimental pre-war technology as well as developed military installations.

On Cyberdogs:
[quote=The Fallout Wiki]Cyberdogs are rare and creating one is extremely difficult, requiring both a high degree of technical sophistication and generalized breeding and training programs. As such, they have only been produced by technologically advanced organizations such as the pre-War US government, the Enclave and the research team of Big MT.[/quote]

Your character, until otherwise proven, would not have been a unique exception to the rule akin to a penultimate/end boss with access to pre-war technology and a developed military installation, and they weren't bred in a kennel (presumably). It is just as well that you've decided to change them up, because even with the provided listing of Cyborgs in the Fallout Universe, I do believe my prior statements stand, and it would be difficult to explain the circumstances surrounding the inception of your character.