We've had dogs stay with us, and they liked the waterbed (that warmth thing, I suspect). But our current mattresses are several generations beyond the originals; these are sloshless, tough, and durable. (Although our previous ones were tough, but not tough enough for a three-year-old grandniece jumping around on it while unsupervised by her mother and grandaunt, who were deep in conversation... or so I'm told. 🙄)