The nods and shakes of his head were convincing enough. It didn't make Sam relax or feel any better about the situation - on the contrary, it just verified that his brother was being severely screwed with, which was something Sam wasn't terribly fond of - but at least he knew that he was talking to Dean rather than some random rodent that had decided to make itself home in his brother's apartment. Sam leaned in a little bit closer, noting that Dean didn't seem to like it much when he moved around. Fortunately, his claws weren't all that sharp, otherwise Sam would have felt more than the slight pinch at Dean clinging to the leg of his jeans. "Sorry," Sam apologized, going still. The drop from his knee to the floor didn't seem all that high to him, but it was probably pretty massive for Dean. He was ridiculously tiny compared to Sam and with the way that Sam was sitting, with his legs bent at an angle, something told him that a small drop to the floor for Sam probably felt like a dive off a rooftop for poor Dean. So, when Dean hopped into his hand, Sam was quick to bring his free one around, gently pressing against Dean's side - which, wow, was surprisingly soft - as he shifted once more. This time, Sam scooted back against the wall and brought both of his hands closer to his stomach, giving Dean a little more security than he would have found sitting on his knee.
Hopefully. If Dean didn't freak out because of Sam moving around so much. "Sorry," Sam repeated, looking down at Dean awkwardly. He felt less stupid about talking to an animal than he did before, but that didn't make Sam feel any less awkward about this entire situation. What did one do when their big brother was turned into a chipmunk? Panic? Storm off in search for the blood of the one responsible? All Sam could think of doing was this. Just sitting around, feeding his brother peanuts, while helplessly asking those around him for help in finding a way to reverse what had been done to Dean.
Dark hair falling into his eyes a little, Sam cast his attention toward their surroundings. Nothing seemed unusual. Nothing screamed 'hey, I'm the reason your brother is a rat!' at him. It was just...Dean's room. Closing his eyes, Sam let his head fall back against the wall. "I'm probably gonna have to take you back to my place. We'll lock Fluffball someplace, so you don't have to worry about that, and I'll look after you until we figure this out. Leaving you here alone would be stupid. This is all..." Stupid. They were stuck in the middle of an apocalypse that Sam had started, Lucifer and Michael wanted he and Dean to be their vessels, and his brother was a rat. Sam was all for trying the optimistic thing - he'd been doing pretty well lately, for the most part - but on days like these...
It had been so much easier when he could just wash it all away with a couple mouthfuls of demon blood.
No, don't go there, Sam thought firmly, opening his eyes. He wouldn't. There meant trouble and they already had enough of that to deal with as is. Even if it did make him feel better. Sam looked back down at Dean, one hand already sliding for the bag of peanuts again. "You want some more?"