That depends entirely in the individual personality of the betta. In the general sense and rule of the agresiveness of betta splendens unless there is a back up plan it should not be attempted in my oppinion, specially by beggining aquarists. You should also take into consideration that Dorcy has a 15 gallon tank... I personally would attempt anything alike unless I had at least double of that.Dino said:I disagree.
I have kept a betta in a 55 with platies and guppies for over a year now with no problems. The betta just ignores the livebearers.