this show is freaking brilliant. based on how Sara's boyfriend Adam see's her dog Wilfred, as a person in a dog suit. the writers Jason Gann and Adam Zwar obviously know dogs really well, because they have conveyed a dog's behavior perfectly into a human actor, and it is brilliant.
ever walked up to a dog tied up outside a shop and gone to say hello or pat it, and it shows it teeth and gives you the look that says 'stay away'? in one episode, wilfred is tied up outside a milk bar while adam and sara are inside. he's playing with something, head down. a man walks up towards the shop and heads to wilfred with his hand out.
wilfred looks up, tilts back and says 'f*ck off'. spot on.