Neighbors abandoned a young cat. We took it in. At the time She was inside/outside cat. Her belly got bigger so I figured she was pregnant. We bought a litter box and she has been inside since. Her belly has been large and nipples extended/pink. She got out this morning and was gone for 7hrs. Tonight she came back and her belly seems to not stick out to the sides as much but is still big. She doesn't have the "I just have birth" look to her and no signs other than a slightly slimmer belly. Do cats "drop" or can the belly go from stocking way out to just normal big? Newbie cat owner