Help identifying this thing requested

Two avian vets don’t know what this is! One has a theory, but we’re going to hold off on relaying that so we don’t bias the responses we may get here.

So we don’t disturb anyone who doesn’t want to see this, we’ve put a cute pic of our Sleeping Beauty first, a Quaker, followed by photos of the “thing(s).” The large thing from several angles, a little spiral that fell off of it, and a finger nail for size comparison.

First off: our bird has seen the vet since this happened, who declares him a very sturdy bird, strong and healthy. So there’s that.

And this thing is now at the histology lab of a university that specialises in animals and agriculture, so hopefully we will get some answers soon.

Yet despite our bird’s energy, activity and apparent health, we’re still a little anxious!

Here’s the background:

~~He was preening on a shoulder. Then suddenly he whipped this out of somewhere and it plopped onto the shirt. Did it come from his feathers? His body? His bum? Is it a gland? A tumour? A parasite?

It was soft and plump and cool to the touch. It was a deep pink. It also had tiny spikes all along the outside length, but you can’t really see them in the photos. Several rows of spikes.

The little ring-shape (spiral actually) fell off of it when we were trying to move it for pics from different angles. Seems to be quite separate but same colour and … material

We think it came from under his right wing or somewhere on his right side~~

All ideas, guesses and especially experience with this kind of thing much appreciated!