I hate to break the rules and ask for 'poof' tf but if you could find this I would be deeply in your debt.
I have been looking several years for the 1975 turkish film called "Tatli Cadi" / "Tatlı Cadı". It is supposed to have some animal tfs in it including a dog, goat, pig and plant according to the metamorphose.org bio.
I've spent endless hours on search engines following every crazy lead but have always come up dry.
It's sequel, "Tatlı Cadının Maceraları" is readily available but only has a male fish tf.
As far as transformations are concerned, I've always been more into the victim's mental state before/after being transformed than the actual process. Hopefully you'll accept that as excuse for it being 'poof'.
Regardless of the outcome, thank you very much for the opportunity!