Check with your local feed store/farm & home stores to see what they have in stock. Lowes wants a fortune for 3' x 25' half inch hardware cloth!!!!!
I found half inch hardware cloth at a local farm and home store....100' long x 3' tall to put around the base of a 20' x 10' kennel area to keep predators out, plus I used it to enclose my chicken run 12' x 6' tall all for only $94, which is a lot cheaper than buying it from Lowes in a much smaller amount. I also covered the top of the 20' x 10' area with it. The size of the fencing to buy is to keep your chickens/ducks from sticking their beaks/heads through where a raccoon can pull it through to decapitate and/or kill.
I also layed the hardware cloth on the ground of the 12 x 6 run and stapled it to the wood support boards along the bottom to keep predators from digging in. Depending on the size of your coop, run and any additional spaces, it really doesn't take long to use up 100'. In the end you'll have the peace of mind knowing you have fully protected your flock.