How did the Collie treat White Fang

Check out this quote from the book,

"But there was one trial in White Fang's life -- Collie. She never gave him a moment's peace. She was not so amenable to the law as he. She defied all efforts of the master to make her become friends with White Fang. Ever in his ears was sounding her sharp and nervous snarl. She had never forgiven him the chicken-killing episode, and persistently held to the belief that his intentions were bad. She found him guilty before the act, and treated him accordingly. She became a pest to him, like a policeman following him around the stable and the grounds, and, if he even so much as glanced curiously at a pigeon or chicken, bursting into an outcry of indignation and wrath. His favorite way of ignoring her was to lie down, with his head on his fore-paws, and pretend sleep. This always dumfounded and silenced her."