To try and answer your question properly - LOL

I assume you would need to get the basics of one then introduce the other.
Zipper does agility, but not fly ball, and we did an introductory 6 week course followed by 3 one on one lessons then we had the basics enough to join the main classes.
Is it something you plan to do with Kya? I reckon she'd be good at them as she is a quick learner, don't know anything abut Flyball but you have different size classes in agility.
(we only do agility for fun - don't enter competitions)

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