I'm sorry, I did not mean to offend anyone. Yes, I know this is not a thread about cages but I want to help you make sure everything goes okay. I am just going based on the cage size standards on the main page. For 4 pigs, it says a 2x6 is the minimum and like I said, a twin mattress is only a tiny bit bigger than a 2x5. Personally, I think 4+ pigs in a 2x5 is cramped. I just want you to take a few extra steps to ensure that everyone lives comfortably until the babies are adopted. I understand that what I've said may have come out as rude, and again, I apologize. If you truly do not wish to hear why I think you need a bigger cage, I won't mention it. All I really did was ask about the dimensions of your cage, curious how big it really is, and when you told me what you estimated to be the size of the cage I just gave my honest opinion and some information. I don't think I was being harassive, but if you believe so, I will stop. I really hope everything goes alright for you. I know it must be stressful to have 4 pregnant sows.
Best of luck.