Hen still to traumatized to lay?

[Whitney9988]

In September my dog attacked my chickens. Two had to be put down and the third survived. Since the dog attack she hasn’t laid any eggs. She’s only about 3 years old. Is she still in shock over the whole ordeal or is she done laying for good?

 

[Three Cedars Silkies]

I really don't know the answer as I'm haven't been having chickens very long, but from what I've read from the folks here, some chickens never recover from a trauma. Also, I know that some hens don't lay after 3 years old. Maybe it's a combination of the two things???