We have two one year old presumably female Oscar's. My older female Oscar's suddenly started picking on them really badly so we need them gone before they get beat up too bad. They are fine with each other and can go together or separate.
These are amazing healthy fish that will get big. Right now they are just 8-12 inches but will double in size so will need a large tank. We currently feed them a mixture of live feeders (minnows and crayfish) and quality pellet food.