Hi, I have ancona ducks that I'd like to keep contained to an area in my yard. I found some knee high fencing on sale and I am 90% sure that this will keep my ducks out of the flowers. BUT next year we want to experiment with a few other breeds of flightless ducks and maybe even some geese and I'd like them to stay out of the flowers too. Do you think that a 2 foot fence will be enough to keep flightless ducks and geese out? thanks!