Yes, they can. You said you lost a chicken? Shat could be a stresser if they were close. I have a rooster that I have to bring in the house once a day to see his favorite hen because she went broody and he got depressed. He would pace back and forth in front of my door because that was the last...
That is too much time away for being broody. Are you sure she is not molting? It is the right time of year for it and mine just finished a light juvenile molt, I could barely tell. They usually don't just stop laying after such a short time unless they are broody, in molt, or have a problem. Are...
Feel the lower belly for a hard mass. This link gives the most common symptoms and treatments for it:
https://www.backyardchickens.com/a/a-couple-chicken-problems-and-how-to-fix-them
If she doesn't fit any of the symptoms and you don't feel a mass than you might want to look at this broody...
Check to make sure she is not egg bound. It sounds more likely that she is broody, but anytime they stop laying you want to check for egg bound just to make sure. Does she stay in the nest without an egg? If so, you may want to try and remove her from it every chance you get. Some are able to...