I came here to report the same issue. Thank you for reporting this!
I have so many animals in my zoo, especially my breeder zoos, that it renders it so frustrating to play that it's basically unplayable for me in the meantime except building. I filter by species constantly so I can filter each species by age or appeal, so I can sort through new adults to keep, release, or sell.
I hope this isn't an issue we have to wait for another major patch to fix.
