Dense Dog with Panties

My family recently got a puggle (a cross between a pug and a beagle) at my home, and he turned out to be a very dense animal. For example, earlier today he ran full speed into a wall while chasing a ping pong ball. Perhaps even more concerning is the fact that the 8 pound monster ate a pair of my sister's panties. He choked a little and ultimately swallowed the whole thing. So now he might die, but we're hoping he will somehow digest the panties. Let's hope the panties aren't as dense as he is.