Thank you for the detailed and quick answer, very interesting stuff. I'm really enjoying the game and hope you keep working on it.
Here is my Doggo1.0 in said generation 5: https://screenpresso.com/=XPqZe
He is a happy little fellow, but peaked at 24% effiency after 40 generations. With a few small improvements, Doggo1.4 is currently at a 32% effiency and not too bad at jumping either. What I love most about him though, is how lifelike he moves now (apart from the fact, that his hind leg is a spring ;) It's really fun to work on a creature, let it run a few generations and come back to see, how well the improvements worked.