It turns out that Gray saw the wolf's suicide note ...-Ryan

I'll go on for you: Mom said, Dad, you are sleepy and need to sleep, but don't sleep too long. You said you would help me catch sheep and take me to the seaside. After you wake up, Gray will give Dad a T-shirt to make him handsome! Dad, you sleep well, sleep well, and you will play with me. Dad, mom always said that she married the wrong wolf, but Gray found the right father. You are the best father in the world. Dad, little gray will always love you. You will get up soon. Oh, get up. Our family will go on a trip. Little gray relied on his invention. Dad, I can't write. This is the letter I tried my best to write to you. Gray loves Dad forever!