0 Vote. Alegre in Spanish means happy. Between that and the Italian definition of allegro I have wondered why an allergy medication is named Allegra. Is it a coincidence, probably not.
This dog illustrates how hard it can be to read tails. He face looks happy, but his tail looks like he may be alert or aggressive. However, since he is a doxi/chi mix, that could be his natural tail set. We have all heard the common myth that a wagging tail means a happy, friendly dog. While it is true that dogs do wag their tails to express happiness at seeing a person (or dinner!), dogs also wag their tails to show other emotions. In fact, dog tails are more like human faces, showing their emotions through movement and position much like we do with smiles, frowns, pursed lips, etc.
The Circular Tail Wag. 1  This is hands down my favorite wag. I believe that a dog whoâs tail wags in a circle is the happiest he can be.  I have one dog who wags in a circle, and he always does this when I come home. I think it means he is elated.