Solere: "to be accustomed to, to be used to, to be in the habit of". I think that the translation of solere into a verbal equivalent should be acceptable, though I tried "The dogs are accustomed to sleeping on the floor". Duo probably didn't like the gerund, but I can't see a problem with it.
I feel bad for Pompey, but it's too crowed up here with, me, my weasel and the many, many fishes yet to be thrown on the floor. Indeed my dog is named Pompey, and yes I backed Caesar in the war. My parrots named Cato so I guess it's OK. Though he better keep quiet or the Praetorians may pay us a visit.