"I'm guessing there's more that I don't know about?"
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Angelica is a terrier and one of Bitch's original three dogs.
A well-trained attack dog, Angelica is the third dog Rachel trained to use her power on, and the fourth animal she massively increased in size. In Brutus' interlude, she is still in training but rapidly becoming a part of the pack.
↑The dogs weren’t running, and it took me a moment to realize why. There was one dog that was larger than the rest, with half of a bison’s skull strapped over the left side of its face, the horn arching out to one side. Armor and bones had been strapped on elsewhere. It didn’t seem like something Rachel would have done, dressing up her dog. One of her underlings?
It’s Angelica, I realized. The dog lumbered forward, moving at a good clip, but certainly not the speed the dogs were capable of when they went all-out. Rachel was controlling the speed of the other dogs to allow the wounded animal to keep up. - [rahumans.wordpress.com/2013/07/13/scarab-25-6/ Excerpt] from Scarab 25.6