Snake looks to them and lets them go. They seemed a little hesitant but they still leave. Snake knows how much it means to Adrien when he uses his own words, his own voice. It might not be something he finds easy, but if Adrien is going through all this effort there was obviously something important to be said.

Snakes don't really need to eat often, every other month would be acceptable if it came to that, but Snake let them eat a lot more often than that if they wanted the food. He sits up straight, that same not-smile there in his expression as he quietly says, "Thank you." He really means it. He loves that Adrien made him food, that he complimented him, that he was thoughtful enough to consider the snakes as well.

He takes a taste of the food and the look on his face says everything Adrien needs to know about Snake liking it. If that doesn't, Snake trying to restrain himself from shoving it all in his face at once should say something.