What does pertelote use to diagnose chanticleer?

Pertelote uses a combination of her observations and her instincts to diagnose Chanticleer's distress. She interprets his fearful dreams and suggests that they might be the result of a weak constitution or a lack of proper diet. By encouraging him to focus on the positive and dismiss his fears, she believes that she can restore his confidence and well-being. Ultimately, Pertelote emphasizes the importance of rationality and practical solutions over superstition.