Cyber Wolf

Cyber Wolves was the name given to cyber-converted dogs used by Cybermen. (PROSE: Plague of the Cybermen)

Characteristics
Partially-converted dogs retained their organic torsos, which attached to a canine Cyber-head, and were supported by a set of four metal legs. (COMIC: Enemy Mine) The Eleventh Doctor guessed that Cyber Wolves possessed olfactory circuits which allowed them to smell targets, leading him to nickname them "Cyber-sniffers". (PROSE: Plague of the Cybermen)

History
The Cybermen of the Cyber Legions that crashed on Earth in the 19th century created a pack of Cyber Wolves. They killed Worm and were encountered by the Eleventh Doctor. (PROSE: Plague of the Cybermen)

Several cyber-converted dogs were used to aid the reconstructed Cybermen in taking down the predatory Ice Snake in the arctic zone on Centuria. (COMIC: Enemy Mine)

On a ruined parallel Earth, the Petronella Osgood, Vikram Shindi and Josh Carter of N-Space fought a mutated, feral dog that was cyber-converted after coming in to contact with a large Mechanising Worm. The Machine attempted to use the converted dog to intercept Osgood, Shindi and Josh so as to use their mental avatars to form a dimension bridge to N-Space, but the dog was killed by Shindi, after Osgood realised that the dimension bridge technology's total brain immersion made the trio as strong as they believed themselves to be, allowing Shindi to kill the converted dog with his physical strength alone. (AUDIO: Telepresence)

Alternate timelines
In an alternate timeline created when the Cybermen used Time Lord resources to conquer all of time and space, a similar converted canine, equipped with three energy weapons atop its back, stalked Jackie Tyler in the ruins of London on the Cyber-Earth in 2006, before she was rescued by the Ninth Doctor, Rose Tyler and Jack Harkness. (COMIC: Supremacy of the Cybermen)