I suspect this anime will have several transformations. For now it's have two brief ones:
-On episode 3, the Kitsune called Kon transforms into an anthro Fox on 12:06, process is quick but noticeable.
-On episode 6, around 7:52, a woman transforms into a fly-woman, not much is shown but the process is again noticeable.
https://jkanime.net/kemono-jihen/6/ this is the link to episode 6, you can access episode 4 from there
The main antagonist seems to be an exhuberant red-haired which can become some sort of feral wolf, jackal thingy, only the before and after have been shown briefly as of today.