This is exactly what happened to some of my rainbow fleece I was drying after washing and dying. Used in this nest is blue, yellow and red mixed alpaca, wool and mohair. Then the brown was from some brown alpaca also stolen from me. In this nest 2 eggs were laid and we watched them hatch. Sadly someone’s cat found them and one was gone. Then the second baby met its fate the same way. We do not even own a cat and this is in our back yard. I guess the moral to the story is that they were very comfortable while they were there. Mum went to so much trouble to build the nest.
The picture shows how I dry the fleece and fluff it up.v If some hangs out or there is no wind around, I do not cover and the birds have a lovely time. By Lyn A.