Instructions
Help your goose understand that it is summer. Allow her plenty of time outside in the natural light, so that she can pick up on seasonal cues such as sunshine, plant development and other cues from the natural world.
Compensate for any unseasonably cold or dark July weather, which may be extending your goose's laying season. If it is a relatively cold month without the usual amount of sunshine, provide supplemental lighting and heat for your goose. This should help her body realize the laying season is over.
Allow the goose to sit on a few eggs. Even if the eggs are not fertilized, the action of sitting on the eggs can trigger her body's instinct to focus upon hatching eggs rather than laying more. If you have been removing eggs as they are laid (to an incubator, or to eat), this may have prompted the goose to continue laying.
Reduce protein in the goose's diet. You do not want to starve the goose or make her malnourished, but putting her on a low-protein diet may slow and stop the creation of eggs off-season.
How to Help a Domestic Goose That Will Not Stop Laying Eggs in July
Geese are popular and hardy domestic birds. In the northern hemisphere, geese will lay eggs between February or March and early summer. A typical goose can lay several dozen eggs in a season. If your goose is still laying in July, it may be time to intervene. Continued egg-laying out of the main season can lead to malnutrition, deficiencies and general poor health for the goose, as creating eggs uses up nutrients and calcium from the goose's body. The egg-laying cycle of a goose is linked to the natural seasons and weather changes, so off-season laying may be a result of atypical weather for the season.