The pecking and mounting behavior sounds a bit more normal. Even my females will do that to each other occasionally. The mounting itself though can cause injuries. The charging is a more aggressive behavior. If I were going to seperate one out it would be Snickers.Unfortunately they are both kinda bullies in different ways. Snickers charges Hay Hay whenever he tries to get into a pool and Puddles has recently started pecking at Hay Hay's neck and trying to mount both Snickers and Hay Hay! Unfortunately I don't live in an area where I can get enough females for all of them so hopefully I can keep the situation under control and not have to re-home any of them.