Rough Morning

Yesterday morning, I'm getting ready upstairs in our bedroom when over the noise of my hair dryer, I hear Rocky excitedly take off out our backdoor onto our deck and shortly after some more dog paw noises followed by lots of yelping...as if someone was trying to kill him. I quickly run over to the window to see what was the matter and all I see is Rocky's neck stuck between the spindles of the deck. He's freaking out (he literally pooped his pants, but luckily he wasn't wearing any) and Tom is trying to wrench his head back through the bars. I quickly run down there to help - eventually, we had to take a hammer to knock one of the spindles out of place to widen the space enough for him to dislodge his head from the deck. We have no clue what got into him, he's chased many animals in the past and each of those times, he had remembered to exit the deck via the stairs. Below are his battle wounds...