Santana, N.G. de et al. 2020. Evaluation of post-operative pain and stress in dogs after elective ovariohysterectomy under hospitalization. Brazilian Journal of Veterinary Research and Animal Science. 57, 3 (Sep. 2020), e162908. DOI:https://doi.org/10.11606/issn.1678-4456.bjvras.2020.162908.