Speculations about what Cas was doing during last night’s episode:
Haunting the local pet shot and examining potential guinea pigs to bring home. He can’t just bring any old guinea pig home, it has to be the right one, with the right combination of personality traits… oh, who are we kidding? He decided he wanted them all.
This meant, of course, that he had to find the right habitat for them, and since he picked out so many (5. He picked 5. Ok, 6. But he’s stopping there.) (Maybe.), he has to actually custom make one. That will take up an entire room in the bunker. It’s a good thing there are a lot of rooms in the bunker.
So this requires a trip to Home Depot for the right tools, because if you’re going to make a custom habitat for your 7 guinea pigs (and that one chinchilla, because it was really too cute to refuse), you might as well go big or go home.
Home Depot nets him just about everything he needs, and so he brings all the tools and wood and stuff back to the bunker. He carefully sets the 7 guinea pigs, the chinchilla and the bunny in his room with careful instructions not to get out, and then searches out the right room for his new furry friends.
It takes him most of the day (plus one phone call to a highly distracted Dean) to get the habitat built, but by the time he’s finished, he thinks he’s got quite a fine home for his new friends.
The ones’ noses are quivering in excitement when he comes back to his room to get them and he scoops them up in his arms and carries them down to their new home. They lose absolutely no time whatsoever in scampering around and exploring every nook and cranny and ledge that he designed just for them (with separate areas for the chinchilla, and bunny. And hamster. Did I forget to mention the hamster?).
Everyone looks supremely happy, not the least of whom:
OK BUT where are the fics where for a case in which the only witnesses are of the feline persuasion, and Cas is no longer an angel, & thus unable to interrogate the cat, so Dean & Cas take that thing from Dog Dean Afternoon (only for cats), but it's a disaster because all they do is play and jump on each other, and Sam is left to take care of the case while Dean and Cas take turns licking each other's hair and sleeping for 20h a day snuggled up real tight. Sam can't even be upset, it's adorable.