Depressed gecko?

[Spottie]

I recently got my two leopard geckos back from a friend, who has been taking care of them for me while I been traveling for the past year. They are 3 and 4 years old and have been living together since they wore babies. But now the smallest of them Fiona, have been hiding in her cave for almost a month. The only time I have seen her is when I have dropped a cricket right in front of her hiding spot. Then she comes out with half her body, eats the cricket and backs up inside. The other one Spottie, is outside exploring, enjoying the heater or hunting crickets - as Fiona also used to do, while now just hiding in the cold end of the terrarium.. :anxious:
I'm kinda worried, maybe Spottie is bullying her (She is bigger), or maybe she is sick or something. Can geckoes get depressed.. :main_huh:

Have any of you guys experience with something like this?

 

[Jordan]

Maybe it has someting to do with a change in care routine/pattern when your friend looked after them?
and i agree that it could be bullying, or she may have just become more nocturnal and less active in the day.
Maybe a good idea to check her over for any injuries or signs of illness.