NAVLE（北美执业兽医考题）Day 760

A 6-month old cat presents for having ptyalism and for being underweight. On physical examination, you note a bright copper color to the cat's iris bilaterally. What is this suggestive of?
一只6月龄的猫由于流涎和体重过轻前来就诊。体格检查的时候，你发现这只猫双侧巩膜是亮铜色。这提示什么？