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.
A dog wagging his tail more on the right side of his body is probably more relaxed, while a dog wagging his tail on the left side of his body could be more alert, stressed, or anxious, according to the study published in Current Biology in 2013.