It's the one toy they always reach for whenever the toy basket comes out. They play with it, carry it everywhere, and even snuggle with it. Just like some humans attach to a blankie they had since they were kids, dogs attach to certain toys. It doesn't matter that the toy is old, has rips in it, or smells terrible.
There's even a scientific reason behind this affection. "Some dogs, female dogs in particular, might bond with something that's like a surrogate for a puppy," Erika Loftin, veterinarian and critical care specialist at DoveLewis Emergency Animal Hospital, told The Dodo. "They mother it, they carry it around, and they get attached to it that way."