Then yes, I would definitely say they are pregnant, they will deliver on the 31st day after mating. if you have two other cages, you need to separate them into them but keep them all next to each other so you don't break the bond. If you can afford it buy or make some nestboxes if you cannot find or cannot make any a cardboard box will do just fine. If you can get some straw or you can just put hay in there, and they will take care of making the nest. It is best to separate them now that way you know who's babies are who's and if they are both or just one is prego. Then after day 35, you can put the one or both of whom have not had any babies back in with Zenith, so you won't have to further risk breaking the bond. When one or both have babies I can help you further, but this should get you started. The reason why I say one or both are pregnant is that if it was a false pregnancy they would have nested a week to two weeks before the possible due date, but with it being at day 28 nesting and they deliver on the 31st day then I can say almost 100% that one or both is prego.