Two will get in there and then a third will jump in and all chaos breaks out. They have emptied the pool by doing that. The big pool will hold 4 or 5. I have one that rarely gets in either pool. Usually the others sit outside the pool and watch that one in the pool.
The small pool is meant for the ducks since the geese chase them out of the big pool.
Your geese sound like mine everything belongs to them all the pools all the feeders etc.