The following suggestions are avoidance techniques for controlling geese. The main drawback of avoidance techniques is that they merely cause geese to move to another property. Increasing goose populations will eventually create a larger demand for habitat, causing geese to become increasingly resistant to avoidance techniques.
You can find suppliers of these avoidance techniques on the internet.
Barrier fencing
Barrier fencing is a very effective method for excluding walking geese from your yard. This method consists of placing a physical barrier that geese cannot pass through between the water and the area to be protected.
Barrier fences can be constructed from woven wire, chicken wire, plastic snow fence, corn cribbing, chainlink, netting, or a picket fence. An effective barrier fence for walking Canada geese uses durable material with openings no larger than 3 inches by 3 inches that is at least 30 inches high. Before you build any fence, check local ordinances at your planning and zoning office.
Hazing
The simplest method for controlling problem geese involves frightening or hazing geese. In some cases, repeatedly and vigorously chasing geese from the property while armed with a broom will cause the geese to relocate.
Noise-making scare devices are a type of pyrotechnics and can sometimes be used to haze geese from your property. Pyrotechnics are most applicable in rural settings. These include "bangers" and "screamers" fired from a special launcher or "cracker shells" discharged from a 12-gauge shotgun. These devices may be offensive to neighbors. Check local ordinances before purchasing or using pyrotechnic devices. Use pyrotechnics consistent with manufacturers instructions and safety precautions.
Some golf courses have had success hazing geese using highly trained border collies with skilled handlers to repeatedly chase geese from fairways and greens, forcing the birds to relocate. At homes, confined or chained dogs are not effective deterrents since geese quickly learn that the threat is limited. Free running dogs are not popular with neighbors and not allowed in most residential communities. However, dogs confined to the problem area by an electronic "invisible fence" may be useful in some situations. Careful selection and training of a dog motivated to chase geese is necessary to ensure success.