
Boy does this bring back memories.... Years ago our lab ate the bedroom TV remote control (the same dog who ate wall board, masonite siding, carpet, you get the picture)
We came home to find him laying on the bed with the TV blaring (the crunching must have turned it on) and the remote in pieces around him.... looked like he'd had a little trouble turning the TV on to watch

. We couldn't find the batteries from it, called the vet and they had us bring him in for stomach x-rays. They were concerned that stomach acids would eat away at the outer covering of the battery and end up causing the "battery acids" to get into his system. The vet still laughs about this episode - Pluto was well known at their practice
Hope things turn out OK!