Majorly neutral, leaning toward -1 because...
What purpose would they serve gameplay wise that wouldn't be broken, that an officer can't already do themselves?
You could have them have a speed potion effect so they could catch and "grab" (bite) criminals, but it would absolutely not be something gang RPers would approve of (wouldn't really be balanced) so that's out of the question. Sniffer dogs would also require meta knowledge of what people have/where missing people are, or staff intervention, which leads to it being much more suited for an event team run scenario rather than individual players. Without something special to do, they genuinely have no reason to exist really beyond being quirky animals that follow officers around.
That's... kind of all they'd do, since they'd need way more attention given to them to think about how they'd interact with permissions and combat situations, or chases. Animals can't gangRP in the first place, yet suddenly this would basically be a case of introducing that and all of the problems that come with it.
Additionally, you need some quality assurance for the whitelist holders. You can't just hand it to anyone that has the whitelist. Animals can't talk. Animals can't point things out or motion or gesture the same way that humans can. Yet the majority of animal whitelist holders play their animals like they're neo-humans that only cannot speak the human languages, with extremely high intellect and cunning that feels more suited for a Disney film.
Thus, it would basically present a situation of having to have a separate 'faction' of sorts for them, or have it be exclusive to KPD whitelist holders.
...Which, leads to the problem that
@Ecocide is extremely aware of - taking away play time from the actual human officers in exchange for playing the dog character, which is restricted in what it can do and requires extensive attention from human characters to function.
It sounds good on paper, it sounds cool. But in actual execution, they don't add anything that KPD doesn't already have and they would require too much effort and focus in order to make work in general. I simply don't see it being worthwhile.
Maybe more ideas could be pitched, but it would require a lot of discussion and staff focus to actually figure out a way to implement them in an interesting and meaningful way, which I don't think is anything near a priority right now.
So tl;dr: I would leave it to the event team to do it, if they ever have a situation where it comes around, or have way more discussion about it by staff/KPD higherups. But outside of that? No, I just don't think it would be worth it.