Nice day out today, so I let the girls have some direct access to the sprouts. You can see the areas they've been kicking up the mulch onto the plants.
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As an experiment, I decided to rake up some of that area, pull out the mulch, and drop in some new seeds:
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I think after this experiment, I'll give them full-access to the inside, let them have their fill for a few days, then raise the frame up about 6+ inches to see if that helps with the mulch covering.
I guess I could also pull out some of the mulch we added to the run.