Going back to the intelligent animals, I've gone back to get Tolkien's actual language.
The three Hobbits have just left Bag End, and are very quietly and secretly going cross-country. They stop for the night, curled up among a great tree's roots.
"They set no watch; even Frodo feared no danger yet, for they were still in the heart of the Shire. A fox passing through the wood on business of his own stopped several minutes and sniffed.
"'Hobbits!' he thought. 'Well, what next? I have heard of strange doings in this land, but I have seldom heard of a hobbit sleeping out of doors under a tree. Three of them! There's something very queer behind this.' He was quite right, but he never found out any more about it."
I thought I remembered yet another animal who is assigned either speech or rational "inside-the-head" thought, but I can't remember now what it was, and I haven't run across it in my current reading.