@Chikahiro In Steamfluffs, I mentioned that one of the progenitors of the fluffies had reticent dog memories, as well as dog DNA, which was passed down to the fluffy species that it spawned.
I think dog DNA should be a part of fluffies, aside from parrot and human DNA, to explain both their domestication and loyalty. I really like how Waggytail explored the more doglike aspects of fluffies, like in this pic of a fluffy at the park.
The idea of exploring domestication in dogs and fluffies is also interesting, because of how humanity has changed the wolf to become a domestic dog. I would like to share a video about the domestication of the fox in Russia:
Fluffies, to me, is both an extreme domestication of the horse into a household pet, in addition to their further augmentation with other DNA (like possibly dog). Its also why wild/feral fluffy stories are interesting - how changed would a fluffy be if it lived in the wild?