This one was going to be fixed but got pregnant to fast. This will be her fourth litter and she has never had any problems. Usually she pops them out pretty fast. She lost her mucas plug at 6pm last night and had two of them before I went to bed at midnight. This morning we woke up to 1 more (pretty fresh still). for the first few hours she didn't appear to be having any contractions although she clearly was not done. There is at least 1 more in there, maybe 2.. She left her kittens and walked around my office restlessly. Then I saw her crouch in the corner and have a contraction. That was at 11am. She is back with her kittens now and has still not had another one. Her contractions appear to be getting stronger and stronger and closer together. It doesn't usually take this long with her. When do you think i should take her to the vet?