The dog's ability to close its eyelids completely ... A fluorescein dye strip is wetted with sterile saline eye wash and touched to the sclera or conjunctiva of each eye (Fig.

A couple of weeks ago, I took a look at the mystery of when the first dog was domesticated — and by whom. The answer is at least 14,000, and quite possibly as much as 35,000 years ago. As for who, the ...