"Any intelligent fool can make things bigger, more complex, and more violent. It takes a touch of genius -- and a lot of courage -- to move in the opposite direction."
- Albert Einstein
Does your dog normally ask to go out? If so and she is not asking, it's behavioral.
If not(you take her out on a schedule without her asking), it indicates a health issue or not enough time outside as she needs for the last trip out.
The sudden change can be increased water intake with the warm weather, meaning she might need more time outside to fully empty her bladder.
Watch her water intake and take her to a vet to be sure.
