Ryan comes through for Wilfred this week.
After leaving the dog at canine care, he's told by his furry friend that the guy in charge, played by Ed Helms, is doing very crude things with peanut butter. It's never established if Wilfred is telling the truth, but Ryan blows off his sister in order to rescue Wilfred from the situation.
This isn't to say that things with Ryan and Kristen are in a bad place, though. They mostly get along well this episode.