None of my pets ever were far from home. However,when I was young i had a collie who had a mind of her own. If I took her for a walk in the woods and she decided it was time to go home, she went - all by herself (about a mile). She just walked off and went home. Sometimes I'd spend hours scouring the woods looking for her only to find she'd been home all the time.
I only have one pet, Baby the cat, who disappeared. I still have her favorite toy which stays with me. She is old now, I hope someone found her and took good care of her.
I'm sorry to hear this. I know how difficult it is to have to lose a beloved pet. One of my sisters has had to do tht with two of hers and I miss them every time I enter her home.