I purchased 6 Silkies about a month ago. 2 whites, 2 blk, 1 blue and one partridge. With Silkies of course they have these tremendous top knots and you can't see their eyes. I look at them periodically, though not all of them at one time. But the other day I noticed one that really didn't seem to know where he(?) was. Today I looked at him closely and noticed that his eyes have crusted shut. I looked at one of the blks and saw that one eye was also crusted shut. I took them out and cleaned them thoroughly and gave them a haircut, but they really dont want to open their eyes. What is the cause of this, and what should I do?