My Speckled Sussex are 9 months old. The other day I noticed feathers all over their run. I thought there might be a feather picker so I watched them for awhile and didn't see one. I did see that Betty is the one missing feathers. I was letting them free range and I went to grab her and she ran I grabbed her tail feathers and one fell out fairly easily. I looked her over and didn't find any mites or lice. Feathers were falling out of her just from me moving them to look for bugs. I did notice that up by her head there are new feathers starting to grow in. She is not acting any differently. Is this just a soft molt or could it be something else?