The Howlers from behind weren't just regular members of the gang. Their bodies started to morph and transform, changing into parts of beasts. Those who didn't transform were holding onto Anti-Altered weapons.
These people were a special group within the Howlers. Nearly all of the Howlers, including non-Altered members, were trained by Crowley. He had daily lessons that would run three times a day, each time with a different group.
However, Kai had told him to pay special attention to a particular group because they were all Altered. With the funds they received, they bought up all the Altered solutions they could from the black market, making themselves stronger.
They also had Tom trying to work on a way of making his own Altered solutions. He was close, but it wasn't possible just yet. Either way, those most loyal to the Howlers had been selected, the ones that worked under the core leaders.