Can you foster her for the time being until a rescue can help find her a permanent placement? We did that with a litter of kittens once. (Good times.) Sometimes they'll do a courtesy listing on their website, and some of them will even help you with paying for the spay, shots, etc. I know it sucks having to keep her separate from the Chihuahua, but its better than the pound.
Either way, welcome! Hopefully someone will be along shortly to approve you to post in the other sections.
