This morning I put a large handfull of frozen grapes out in the run for a treat. There was plenty for all 4 of the girls. Is it normal for one to pick a grape and all the others to chase to take away the one grape when there are 15 or more sitting there? They did the same thing with the worms I gave them. I don't want them to hurt each other to get one thing when there is plenty for all of them.