[Caney Creek]

I would get him to the vet ASAP, especially since you've noticed him getting thinner this past week. It is very possible that he's eaten some that are not coming back up -- an obstruction like that in his GI tract could kill him, and WILL kill him if he cannot pass it on his own. I used to pet-sit a German Shepherd who also had a habit of eating socks -- one day his owner saw him throw up one, took him to the vet where they ended up finding SIX MORE socks in his intestines.