I am sorry to hear about Lola's bald patch. My name is Rebecca. I am a veterinarian and will do my best to help.
A picture would be helpful. Where on her body is the patch?
This could be as simple as a wound that is healing, and if that is the case, the hair should grow back in. I can see some new hairs growing in; it is not totally bald.
If she is grooming more, she may be itchy, and may have groomed that spot excessively and caused the baldness by licking the hair off. If she is itchy and excessively grooming, this could be some kind of allergy. Do you use flea products on her?
Thanks for the pictures, that helps!
If it happened that quickly, then she may have licked/groomed the hair off. That can happen overnight. If that is the reason, then she may be painful in that particular spot, or she may be overgrooming because she is itchy or allergic. Since you are using flea control, it would not be a flea allergy, but it could be something else in the environment.
You are welcome!
You could try giving some Benadryl, 5 to 10 mg twice daily. If that does not help, then a veterinarian might give a cortisone injection. At my clinic, that would cost around $60 for the office call and $20 for the injection.
I would look closely at the area, possibly even get some skin cells to examine under the microscope if I were able to see and examine her.
Thank you for the good rating and bonus!