Suggest some old animal classics like Lassie, The Yearling, Old Yeller, Where the Red Fern Grows, etc

Some of my favorite quotes from Lassie:

“It was time to go for the boy! She wheeled and began trotting away- trotting as if she had but a few hundred yards. There was nothing to tell her that the rendezvous she would keep was hundreds of mile and scores of days away. There was only the plain, unadorned knowledge of a duty to be done. And she was going to do it as best she could.”

“And the heart was gallant and the instinct was true. And so the dog went, day after day, steadily south in the Highlands, over bracken and heather, through hill land and plain, through stream and woodland — ever going steadily, always south.”