I work in a lab that does monkey research. What you say is more true about smaller animals like mice, where there are lots of variants, knockouts, etc. Macaque

I work in a lab that does monkey research. What you say is more true about smaller animals like mice, where there are lots of variants, knockouts, etc. Macaques don't really offer those kinds of options, at least not that I've ever heard of. You just hope they're healthy, disease-free, relatively smart, and are easy to get along with.