I have noticed this weird behavior behavior in my cat. She simply loves any thread, whether it is cotton thread, woollen thread or plastic thread. She starts chewing and swallowing the thread.
Today I found her chewing on a long thread of wool. I immediately scolded her and started pulling out the woolen thread from her mouth. To my astonishment I pulled out literally 3 meters of the woollen thread from her mouth. (Probably from her stomach. I had to pull the thread with force. But I did not at that time look inside her mouth.)
So why does she shows this weird behavior? Is this harmful? If harmful how to modify her behavior so that she no longer does this?