Is this even possible and how would I know for sure? I have 2 Brown Chinese that are about 4 weeks old. One of them is very skiddish, screechy and very clingy to the other. We thought it was just that she was a liitle younger than the other and it was probably a personnality thing. She is the first to alert the others of things amiss in their environement so we thought that would be a good thing in the long run. But I've noticed that when she goes down a few steps she does not look down and just tumbles down the steps. If I try to feed her she will just squawk at me and doesn't even look at what I have, she even does this will food bowls. She has even run into me on a couple of occasions. She would rely heavily on the other for comfort. I know she can see, just maybe not very well. Could her eyesight be deteriating? This could be a real issue for her safety.