Thanks for the OP for starting this thread!
I just started Cassi on Angel Eyes as she has terrible tear staining. I've done a google search the other day and haven't found any negative reviews aside what has been mentioned so far. So far I've given her Angel Eyes for the last 4 days and have been giving her a smaller dose then what's indicated on the bottle. Once the tear stains clear up I'm going to switch from daily to bi-weekly and eventually monthly.