I googled Rin Tin Tin. It is a true and amazing story https://en.wikipedia.org/wiki/Rin_Tin_Tin
He was saved by Corporal Lee Duncan from World War I battlefield as a closed eye baby puppy. Corporal Duncan found the starving mother and litter in a bombed out German kennel that had bred war dogs. Then he came back to America and trained his dog. Rin Tin Tin became a movie star and made 29 movies. The poem Mr. Duncan wrote when Rin Tin Tin died at the age of 14 is beautiful. Here it is
A poem called "Rin Tin Tin"
Alert and ready for my slightest word,
Rin Tin Tin I so often watch you stand;
Eager to serve me for that high reward—
A smile, or just a light touch of my hand.
Deaf to allurements of those standing by
when I am near, and deaf when I'm away.
Forever overjoyed at my return
However brief or lengthy is my stay.
Believing in me always, tho I fail,
Your trust you gave but once, and that to me.
Your's are the qualities that men hold high,
Strength and pride and love and loyalty.
Wherever led my path you'd walk my way.
And gladly give your life my own to save.
Enduring pain and hunger, heat and cold—
And broken hearted die upon my grave.
A real unselfish love like yours, old pal,
Is something I shall never know again;
And I must always be a better man,
Because you loved me greatly, Rin Tin Tin.