Quality of Life: continuum from negative to positive welfare with positive welfare situated at the higher end of the continuum based on either the animal’s overall emotional state or the available opportunities for the animal to have a good life (Lawrence et al., 2019). 

Lawrence, A. B., Vigors, B., & Sandøe, P. (2019). What Is so Positive about Positive Animal Welfare?—A Critical Review of the Literature. Animals, 9(10), Article 10. https://doi.org/10.3390/ani9100783