I have two goslings about 5 weeks old and they have a fenced in area outside with a little house that looks like a dog house. I have to put them in the dog house when it gets dark. They will cry and pace inside their fenced area as soon as it gets dark untill I go out and put them in their house. They fall asleep quickly and then I leave. I have to do this every single night. They are like little kids. How long will this last before they go in on their own? They dont cry during the day, only when it gets dark and its time for bed.