What trait did Skeet have when Buck was near death; right after being rescued by John Thornton? How do you know; use textual evidence and reference the page number.

From the text:

Skeet was a little Irish setter who early made friends with Buck, who, in a dying condition, was unable to resent her first advances. She had the doctor trait which some dogs possess; and as a mother cat washes her kittens, so she washed and cleansed Buck’s wounds.

I'm sorry, my copy of the text does not have page numbers. You can find the above quote in Chapter Six, the second paragraph.