My dogs like to spoil their bedding. I'm not sure why, but any foam mattress or small innersprung mattress or dog bedding I get them they dig away at it and tear it up into pieces. Then they have nothing comfortable to lie on ... daft.
Our pup (who is 3 years old now) still likes to destroy many things. The worst being cellphones if we aren't around to turn their alarms off. She crunches the phone until the noise stops. She's also chewed through electrical cords.
Our kittens love to chew through headphone cords. You'd think they could find something more tasty. :P lol
I remember that I prepared a great bed for Yosha when he was a puppy. The next morning I saw that the whole bed was torn, there was a scattered filling on the floor and a big Yosha's puddle on top of it all :))) I did not try to make a sleeping place for him anymore :)))