I had previously mentioned our new roommate, Tulip, a rambunctious but well-meaning dachshund/terrier mix. For the first month, I kept the animals separated with a gate, through which they had a few curious stare-downs and barking/hissing matching. Although harmony has not yet been attained, they are at least becoming accustomed to each other.
I have since removed the gate:
This poofiness, however, illustrates, in general, what Katamari thinks of dogs: