What is the best way to train a dog to chase geese?

if you want him/her to chase things, the best way to do this is get something he/she is attracted to i.e food, a toy etc. and throw it near some geese, then it will run near them causing them to flee, then give him/her lots of fuss and attention and congratulate him/her and give him/her a treat. This is the best way.