As far as kick starting bodily functions, it's the same with Krypto. He's used to exercise to keep things moving.
And, now that he goes out the same way as Hira (another door than before, and a small area fenced.) he will empty his bladder, but then come in and want back out because he wasn't ready to do everything. So then, 80% of the time he goes out the old way to run around and finish up.
Good luck with this new stage. As long as he's happy and you aren't damaged, it sounds like the way to go.
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