Feathers problem?

Hello!
I have a 2 years old indian ringneck :green2: who overall is a happy and active bird. He is never caged, he sings, i haven't noticed anything weird in his behaviour but early this morning i found these feathers around the room



For me, he looks normal, nothing weird, but i did notice he has removed 2 more of these from his chest (didnt cause him any pain, he was pretty chill when he got them out).

I don't have an avian vet in my city, so until i get him to someone who is qualified i just want to know if any of you can identify the problem or possible causes for this.

Thank you in advance! Have a lovely day fellow birb frens