Mmh… a modular dogs generator with animations controlled by blueprints would sell a lot more and be more useful to most developers than a single model or even a bunch of models. Indeed it would be a lot more complex to achieve.
I would probably buy such a generator able to create hundreds of combos and even mutations… like Hellhound types and The Thing/Resident Evil alike movies dogs mutations. Such a modular system would allow a game developer to save a lot of time and place many models in a game without having to buy or create those from scratch one by one.