oh, the other thing is that ducks can be kinda tall when they walk... so I'd check the height of the fenced in part too when you are looking at things online, or ask the seller for more dimensions. Since you are looking at used stuff online, I think for ducks you might actually find something better if you look at dog houses/kennels. I think you will get more space for the same amount of money possibly. You might just need to add a door to the dog house if you plan on locking up the ducks at night. Dog houses are low enough to the ground that ducks can climb in without a ramp, and approximately 2ftx3ft is a pretty normal size for a dog house and would be ok for your 2 ducks.