Urban Animal (Rat, Lizard, Sabertooth, Snake, Wolf, Werewolf, Monster, Pterodactyl, and Baboon Transformations)

Daymon here, with news of the transformation-themed webtoon Urban Animal. It's about a teenage boy finding out he is a shapeshifting creature known as a Chimera. He soon encounters creatures similar to himself. Here is the list of chapters with transformations:

Pilot (Rats Transformation)
Born as Ghosts (Rats to Human Reversion)
Biting Down (Partial Reptilian and Sabertooth Transformation)
Faint (Partial Gorilla, Rabbit, and Sabertooth Transformations)
Shadow Moses (Snake, Wolf, and Werewolf Transformations)
The Messenger (Monster to Human Reversion)
Daedalus (Pterodactyl Transformation)
Matter of Time (Baboon Transformation)
No Tourists (Continued Baboon Transformation)

Zoo (Vulture, rat, sabretooth tiger, tyrannosaurus rex transformations)

Zoo is a short online manga containing a smorgasbord of transformations. Since I can't read Japanese, I can't tell you the name of the author or what's going on, but the art looks very similar to that of Naruto.
The two male protagonists drink potions that turn them into various animals--though many of the transformations are off-panel, three or four have been spread across a few panels. Read Zoo here.

In case you need reading instructions, start by clicking the arrow in the pop-up sign. This will take you the main page. From there, turn the pages by clicking the arrow at the bottom of the screen (the arrow faces right).
Oh, and if anyone knows if Zoo has any other chapters, please tell me!