Wagaya no Oinari-sama (Werewolf Transformations)

(Edit: the original youtube links were removed, so I've replaced them with links from Dutch Bull's site.)

This anime just had a two-parter chock-full of werewolfy goodness!
First off, here's the first wolf-out, episode 21 (Dutch Bull mis-identifies the werewolf's gender).
And there's even more lycanthropic fun from episode 22, as you can see here, here and here.

Krypto the Superdog (Age Progression)

A short but cute age progression scene from the episode Growing Pains.
Scroll to the 3:40 mark.

Black Cat (Werewolf Transformation)

Here's a werewolf transformation from the manga Black Cat (Vol.09, Ch.76). Start reading here.