OK, so Olive does this thing while I'm giving her scritches where her beak is open, her tail is "bobbing" (for lack of a better word), and she sounds like she's panting. At first I thought this might be the pionus wheeze and I was making her nervous. However, she almost always does it when she's all blissed out, eyes closed, flipping her head every which way so I get every pinny. I'm pretty sure she likes it! So... could it be related to her respiratory problems? Or is it a hormonal thing? Do they wheeze even when they're happy?