Baby, our draft horse, would obviously match up with one of the giant dog breeds; color-wise, the St. Bernard. She's always hungry and pretty lazy. The only way she differs from our St. Bernard dog, Bo, is that she is more inquisitive than he is. She always has to be in the thick of things where Bo prefers we wake him up if there is any excitement.
Butter would be an Akita. With that said, I have no experience with the breed. It is just the first dog that popped into my head when thinking of Butter. She's a bit aloof and one in which I would take a guarded approach. She can be a bit snarky at times.
Windy would be an Irish Setter. Tall, lean and graceful, not to mention always having her nose in the air. She can act a bit like at aristocrat but then two strides later, look like she has fallen off her high heels and hope no one was looking.
(And this, folks, took an hour of my life that I will never get back... )