Alright, I'll take the second option. Sorry but you edited your post after I posted mine. Sorry for taking so long to post, my dumb computer kicked me off.
Name: Sarge
Breed: German Shepard
Age: 8
Gender: male
Crush: none
Mate: Amy (not seen, only mentioned)
Pups: has 7 but they're not seen ether
Personality: Strick, cold, like a drill sargent (thus the name), can come off as mean but always has his team's best intrests at heart. He's fatherly toward Harley, relating to her because they both lost a close partner, and he tipically treats her warmly.
History (must be at least three lines): An old police dog whose been on the force longer than many of the other dogs were alive. His mate and pups live on a farm with his owner, who lent him to the police force, and he's going to retire soon to be with them. He's considered the 'chief of police' by many of the dogs because of his age and wisdom. Though unoffical, he's looking for a successor and is considering Harley strongly. His partner was killed in a raid on a dog fighting ring and it left him cold and distent to most but he treats Harley like she's his daughter because she's the only one he really relates to. The same accident injuried his right hind leg, causing him to have a limp. He doesn't get along well with Kodiak at times, due to Kodiak's rudeness to woman but tries to keep all his 'troops' best intrests in mind.
Pic:
Name: Mammoth
Breed: Rotwiler
Age: 3
Gender: male
Crush: none
Mate: none
Pups: none
Personality: Psychotic, cruel, mean, viscious, and generally evil but slow witted and dumb.
History (must be at least three lines): He's a member of Hughes' gang and surves as Hughes' 'enforcer', due to his size and strength, as well as stupidaty. He has gigantism, making him twice the size of a normal dog his breed. He used to be a member of a dog fighting ring.
Pic:
Name: Mako
Breed: human
Age: 36
Gender: male
Crush: none
Mate: none
Pups: none
Personality: Evil, psychopathic, homacidal, insane, a madman in every tense of the word, vengenful, sadistic.
History (must be at least three lines): An owner of an illigal dog fighting ring Harley helpped break up and it was Harley that got him caught. He's spent five years in prison but has escape, seeking revenge. He was crazy back then but since then, he has become far more insane and psychoatic. He'll do anything for revenge on Harley, even if he must destroy the entire city to do so. No one knows how, but he can understand animals, a trait he was born with. He also enjoys motorcycles and is highly skilled with one.
Pic: 
(Yes I know its the Terminator but do you know how hard it is to find a pic of a darranged greaser style biker?)