If you have a goose problem on your land, you will be pleased to learn that thanks to the Service Corporation it may improve. The Service Corp. is contracting with Crespo's Wildlife Solutions, of Johnstown, to improve your situation. This firm is fully licensed, bonded, and insured. The will be performing a 'nest and egg treatment' as the first step. This involves locating the nests and spraying the eggs with corn oil, which is biodegradable. After this treatment the eggs will not hatch. This is done every ten days during the nesting season. According to Crespo this procedure must be done three years in a row, which is the maturity cycle for the birds.
This treatment, plus scaring the birds away, which you probably do daily, should convince the Canadian Geese to move elsewhere. At least that is the theory.
Only after three years of the above can other things (read that as 'lethal') be attempted.
There are some of us who don't mind the geese, but we must accept that their droppings (a pound a day per bird) is not good for the lake, just the lake weeds.