I've been known to check for the syndrome of "my little dog doesn't eat meat! Why not? Because I never give him any" - i.e., check that DS really does have plenty of opportunities to do whatever I think he's not doing much of. Beyond that, I let him do what he will. The only exception I can think of is that I've always made sure he spends plenty of time outside getting (at least some) exercise, which is a direct health issue. People are differently balanced, at different times, and that's OK...

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