UPDATE: On Stewie (a.k.a Griffie) the porcupine puffer...
I spoke to soon about him NOT inflating himself. Late lastnight he was blowing up like a big balloon over and over. Poor lil buddy. Although..he wouldn't touch the peas, he did swallow the krill whole. He seems to be having trouble chewing. I'm thinking he cut his mouth on the glass when he had the floating thermometer almost all the way in.
However; at least he had some food!!! WOoHOOOO! Now he doesn't want anything to do with me. Dashing away from me when I come to the tank. He's acting as if I may have made him swallow the darn thermometer! Usually Stewie follows me around as I walk by. He won't even let me pet him now, he dashes away.
Humanizing the puffer aside, he's not him self and doesn't want to socialize. Which tells me he most likely is under the weather with lead balls and perhaps glass shards.
I will continue to monitor and update. I will see if I have some pictures of my pet monster handy.