Hi all! I am having a little trouble with my guppies. I have 4 female fancy guppies (oh so pretty!!) in a 10 gallon tank. They have been peachy-keen for about 3 weeks. However, within the past two or three days (teachers love Spring Break too!!) I've noticed Big Mama (she's the biggest female guppy I've ever seen

) has been literally beating on the smaller 3 girls

They scatter when she comes around. If she's sitting "still" near the top of the tank, they're like whee! and cavort around. If she's prowling

, they hide in the plants near the bottom or in the cave

I haven't noticed anyone with nipped fins yet but I don't know what to do!! I like my girls, they're so pretty but Big Mama is making life miserable for the other girls. Please help!!