you can take any animal in the world, big or small, make it the size of a cat or small dog (10-25lbs/4-11kg), and keep it as a pet. (you also have an appropriate enclosure, food, enrichment, etc. and it loves you.)
what are you getting
not that a lapdog-sized one wouldn't be wonderful (or a herd of them, for combing qiviut!) but I'm always amazed by how much smaller musk oxen are than I thought