I'm stuck in creative mode and want to make some graphics for auction but I'm not sure what the most popular breeds are here anymore. Does anyone know which dogs and horses are most common these days? Years ago, it was Arabians and Labs.

Dogs, I'd say probably wolves because there's so many types of them floating around on HP. There's a surprising number of fox breeders, so those tend to go fast although I wouldn't necessarily say most popular?

Horses, I'll say anything with that's splashed for Insomnia :P  Spotted breeds (knabs, app, etc) seem to be popular. Warmblood-y types.

German Sheperds and Kiger mustangs . Jackals , Andaulsans

Definitely any kind of vague WB type breed is good for horses.
For doggos, definitely wolves as Jaya said.

@jaya.. I was just about to come on here and say splash lmao

WB types are def popular... iberian/andies/lus, ect

Paints!!

I second amber. Paint images always sell extremely quickly!