I have a pregnant platy. I recently got 2 more platies. Only the 3 fish are in a 20g. The pregnant platy has been hiding a lot the past week. I have had the 2 new fish about 4 days, but I think she is really close to giving birth. She came out when I fed them and one of the new platies stuck very close to her. She was darting around the tank and the new one was chasing her. No nipping or anything and I have seen them together in the boat but the pregnant one wouldn't eat. Is the new one bullying her or just trying to play? Or is the pregnant one just really sensative because she is so pregnant? I should mention the 2 new platies are about half the size of the pregnant one.