Double Yellow Head Amazon Parrot very sick, what can i do?

I have a double yellow head amazon parrot, I've had her for about a year now and she's 6 years old. She recently got sick, every time she poos she makes a weird sound and her poo looks very thick and a bit bloody. So my question is, are there any treatments for her? any thing i can fix up for her to eat? What can i do to make her feel good again?