there is no way to know for sure if its het, but if it was bought as a normal it most likely is. yes if you breed a het to a het or a visual morph you will get the visual morph. pastel is co dominate if you breed pastel to a pastel you get the dominate which is a super pastel. if you breed a pastel to a normal you will get 50% pastel 50% normal. as for morphs to breed to your pastel pretty much any co dominate morph will give you something cool i would go with another pastel for super pastels or a spider for bees. hope this answered all you questions