We don't have any pets, but a couple months ago installed the Torklift GlowStep Revolution Steps on our rig, along with the removable GlowGuide Handrail, which is a great upgrade. They also have available a product called SafeStep, which helps animals negotiate Rv steps, whether they are the TorkLift steps or other brands. This might help with your German Shepherd. If the springboard effect of the foldout steps is the problem, these GlowStep Revolution steps are rock solid with a 375 lb rating and don't have to be stored inside the trailer.
https://www.torklift.com/rv/safestep