One of my students used an interesting dataset for their final project. It is freely available on the web and might be one I would use in future classes.
Flanagan J, Bissot T, Hours M-A, Moreno B, German AJ (2018) An international multi-centre cohort study of weight loss in overweight cats: Differences in outcome in different geographical locations. PLoS ONE 13(7): e0200414. https://doi.org/10.1371/journal.pone.0200414. Available in html format.