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 same scientific team previously found that dogs wag their tails to the right when looking at something they want to approach, such as their owner. But they wag their tails to the left when confronted with something they want to back away from, such as another dog with an aggressive posture.