Since just conditioner alone didn't help your girl, you could always try the boiling water method. I've never done it, but people do get good results with it.
If it's still frizzy after that, a flat iron is a wonderful thing! But be warned, I tried de-frizzing a (not-so-bad to begin with) Princess Peppermint and after the first session, her hair had improved. After the second session, it got even more poofy than it was originally. After the third session, it remained extra poofy. =[ I don't know if this is a common issue or not but I dunno...don't go overboard if you ever do use a flat iron.
For future reference, the first step I recommend is to gently pull apart any tangles in the hair with your fingers. Don't go crazy with the brush, because that will only make the frizz worse. Once the hair looks like you might actually be able to brush it, start at the tips of a small section of hair and gently brush it. Work your way up the section until you can finally run the brush all the way through it without the brush getting caught. Repeat this until you can do the same to the entirety of the mane or tail. My next steps are to shampoo, rinse, condition, brush a little more, wait a while, rinse, brush once more (with a clean brush, of course) and let the hair dry.
