Getting Felix to sleep through - twelfth and thirteenth nights

Night 12 sleep report: Felix slept through 11 hours

Night 13 sleep report: Felix woke up around 4am, eyes wide open, babbling and desperately trying to chew on anything within grabbing distance, but he wasn't crying. A few yelps and wails ensued over the next 20 mins or so then he went back to sleep by himself.

So according to the 5-night rule, he's not "sleeping through" just yet but 3 in a row is good going.