Y'know what? I'd really like to see a male poodle pup. We've collectively developed this weird set of rules - dogs are boys and cats are girls (flexible) except poodles, they're always girls (not flexible).
Though I guess this has already been kinda addressed by 100% Wolf. Still, I'd like to see it.
Otherwise I'd like to see a shiba inu, a corgi, a Jack Russell pup, a Yorkie and y'know what? Maybe it would be interesting to see a Blue Heeler. Though I assume that's gonna be off-limits for other cartoons for a good long while now!