Our 2014 Eagle had a leaky shower too. Turned out to be the door- the little flimsy piece along the bottom was missing when we picked up. We thought it was coming from somewhere else, since the water was running along the edge and then hitting the floor elsewhere. Dealer sent us a few replacement strips. Problem solved.
2014 Jayco Eagle 324TSBH
2013 Chevy 2500 Suburban
3 kids (14,12,9)
2 Golden Retrievers, Cooper & Claude