Watched a river otter rollicking along the beach stones and it reminded me of a sketch page from last spring, when I had a good chance to look closely at a skull. One of the most interesting things about it was the very simply-shaped incisor teeth, when compared with those of a dog. Dogs' incisors are three-lobed and fairly robust, while river otters' are simple, straight, and almost delicate. I suppose otters don't do very much "dissection" nibbling of prey; they swallow a lot whole… but they do groom themselves, surely as much as dogs… Hmm…