Welcome to Backyardchickens.com aka BYC!
We are glad you joined our flock.
I agree with Mare. Did the change maybe cause them to go into a molt too?
This video will help you learn how to navigate this site:
Chickens don't like changes to their normal routine or group. Not laying eggs is how they protest any disturbances to their comfortable and familiar normal.
Welcome! Thanks for joining. As far as I know... It is either from changes (stress of any kind), molting (which causes stress too and it's coming that time), or the possibility of temperature. The colder, the less eggs.
I am not sure what age your hens are- but age can play a part too. I agree with the posts above, most likely stress.