2 possibilities based on what you have said so far.
1. She is quacking for her drake since you have separated them.
2. She is quacking for you. You said you go check on her when she quacks. She has now learned that if she quacks you will come. Also you said she only quacks around you during the day.
Maybe stop going to check when she quacks. My ducks quack every time they see us/the car. My husband says they are hungry. They’ve trained him. They quack when they see him and he brings food. If we just ignore them and walk away they realize they aren’t getting what they want and stop quacking.
1. She is quacking for her drake since you have separated them.
2. She is quacking for you. You said you go check on her when she quacks. She has now learned that if she quacks you will come. Also you said she only quacks around you during the day.
Maybe stop going to check when she quacks. My ducks quack every time they see us/the car. My husband says they are hungry. They’ve trained him. They quack when they see him and he brings food. If we just ignore them and walk away they realize they aren’t getting what they want and stop quacking.