I have an 11 week old chicken that either has bad vision or something else going on with her. She is a silkie cross that has always had a very large crest. About 3 weeks ago I noticed she was struggling on her vision so I trimmed it back but it only seems to partially help. I've slowly cut more and more back to help her see and get around but I'm wondering if there may be something else wrong. She seems to just stand there until she is tired and then sits down and falls asleep in the same spot. She will peck around until she finds her food and water but doesn't seem o have any depth perception. How do I check her vision to see if there is something going on further? Here she is this weekend before I did my last trim on her feathers.