Depending on the type of domestic goose, they nest continuously thru early fall.

Geese will eat lots of water weeds and FA. The down side to that is the amount of added nutrients that are released back into the pond thru the defecating geese. If your pond has trouble maintaining a good bloom, it may be a good thing.

I'll start treating my wife as good as my dog when she starts retrieving ducks.
http://geocities.com/h20fwlkillr/