They're not about researching the historical pedigree of an animal and they can't be because to my knowledge there is no census for dogs: an animal either comes with paperwork certifying it as a purebred suchnsuch or it doesn't.
Historical records about the pedigree of animals certainly exist. When I was a kid, I was fascinated by the pedigrees of thoroughbred race horses, and had no idea that similar records existed for humans (except for royal families).
The problem for us and this site is that we don't have the expertise needed to answer any questions that might come up. We don't know the registries that exist for purebred animals, or know what archives might hold records that exist outside those registries (e.g. an individual breeder's private records, held in manuscript collections). Tools do exist for analyzing genetics of dogs, and perhaps for other species, but I'm not familiar with them.
I've answered plenty of questions here that aren't in my main areas of interest for genealogy and family history because learning about those things was a skill-building opportunity. Learning what I might be able to glean from old issues of The Blood Horse to answer a question about thoroughbreds might be fun, because I used to study those things when I was younger. But I have no interest in learning dog genetics from scratch just to do the homework for someone who can't be bothered to do their own homework. It would just be a distraction from my genealogy research.
I have no problem with adding a "no animal genealogy" line to the 'not about' list in https://genealogy.stackexchange.com/help/on-topic. Note that the ISOGG and the ISOGG Wiki, while having much information about DNA in general, is only about human genealogy -- they don't even have a wiki article that says "if you came here looking about animal DNA, you're in the wrong place -- try this instead".
It may be tempting to say "well This is about my labradore is only a relationship calculator question, we should be able to answer that" but it really isn't that simple. Because of the practice of linebreeding, and other deliberate inbreeding, there is huge amount of endogamy in purebred animal populations -- figuring out how closely these two dogs are related is not a trivial exercise.
If Stack Exchange wants a site like ours for animal genealogy, someone else needs to start it (perhaps as a spin-off from Pets). It doesn't belong here.