Hi all: so my bun likes to lay out almost fully with his chin on the ground, and I can't help but think he looks sad or depressed. Does anyone know what this behavior means? A pic is below for reference.
No, he's relaxed. His ears are up and he's just chilling. Him feeling comfortable enough to lie down completely is good. A 'depressed' rabbit is generally a stressed rabbit, which means that on the contrary he will stay alert and look anxious. Here's a study about rabbits' body language: http://language.rabbitspeak.com/alas-woe-is-me/