House and Cameron communicate over their cell phones. House explains that he doubts that a guy with an apartment full of old pizza boxes is also a big rye bread eater. Cameron makes her way out onto the balcony. She tries to lure some pigeons over by cooing like one of them -- which is just asinine even if it is kind of cute -- then just tosses pieces of rye bread on the ground when that doesn't work. Sure enough, the pigeons come flying over almost immediately. House says that this means Joe's been feeding those pigeons habitually. But there isn't any pigeon turd to be found on the ground. That's because it's all over my car right now. Stupid pigeons. House's theory is that someone's been cleaning it up. A guy who steals cable would also "steal" fertilizer for his weed garden from flying rats. Cameron finds a bucket, and opens it to reveal a bucket full of pigeon shit. Dude, stealing cable and using diseased-ass pigeon droppings to fertilize a garden you're intending to smoke instead of just buying some nice, clean fertilizer are two very different things. This is just ridiculous. But House is sure they've found the culprit: Cryptococcus neoformans. "Don't cut corners when you're growing your pot," House lectures. He leaves Cameron to collect some samples for testing.