SachiGumi used to offer something like the first 8 episodes on video tape. Or at least last time I looked they did, their site doesn't seem to be working at the moment. Don't think I've seen then available for download.
If you look around some of the sites, such as
AniDB,
AnimeNfo and
ANN, you get some summaries of it.
Certainly Magical Girl genre, as you say, the heroine turns into a pig (but at least a Magical Super Pig...)