In my WIP Summer's Blood, the protagonists come across multiple unicorns at various points on their quest through Faerie. The first two they encounter are a mother and her baby; the heroine of the novel rescues the baby unicorn from a dry well that it falls into. Much later they meet a male unicorn, probably the mate of the aforesaid mother unicorn, which one of the heroes rescues from some trouble; it serves an important purpose in the climax.
My question is, do you think the unicorns should be more on the people-with-hooves end of the scale, with the means to actually communicate with the protagonists (telepathy, perhaps), or more like animals with above-average intelligence? I don't want them to be purely animal like the unicorns in HP seem to be, because the fact that my unicorns are capable of understanding human speech (more so than a trained dog could) and even knowingly repaying debts means they have to be reasonably smart. I just don't want it to seem silly if I make them TOO intelligent. Your thoughts?