I have no recommendations for the food issue, but I can recommend a water fountain. I got one for my guys as a Christmas present and they just LOVE it. There is a little pump in the machine and it constantly circulates the water (including a little "drip"). This might help with her water intake... I ordered my online at www.petguys.com but I have also seen them in PetSmart. They run about $30, but they are worth it.

When Tanner (my youngest) was a kitten it had very "fragrant" poo's but it did get much better as he got older.

Good luck