Welcome Dorothy and puppy!
Can you switch her kibble to a blander/simpler puppy kibble, and one without chicken protein, but with pre and probiotics - to help with her previous giardia? The Diamond Extreme Athlete is for active adult dogs. Our breeder sent us home with a kibble that also produced soft poops and once we changed it, Loua gave us nice turds.
Good luck! Enjoy your puppy!