It took a couple of weeks, but Penny and Desmond are going into their pen with no problem! I took everyone's advice and just feed them at bedtime. They forage all day long. Just toss a handful of peas in and they go running. I only give them peas at bedtime. I tell ya, I think they'd sell their souls for a handful of peas.
And they do get their crumbles and water in their pen at nighttime. Baby pool and foraging during the day. Didn't want you all to think I was only giving 'em a handful of peas at night!