The NIBBLENET ® Slow Feeder Hay Bags - thenibblenet.com - Official website of The NIBBLENET ® Slow feeder Hay Bag - Slow Feed Hay Bags for Horses
I love these "nibble nets." To me they seem reasonably priced; they are extremely durable.
For my mare that bolted her hay and could not have enough to eat all night or she would get fat, I got the one with extra small holes. Now it takes hours for her to eat even the amount of hay she is allowed. I rest easier knowing she has food in her stomach nearly 24/7.
My other mare was one that dragged her hay around and peed on it, wasting lots of nice hay. She has one with regular sized holes. She is a hard keeper, but seems to actually digest better when fed through a slow feeder.
The reasons I chose these particular nets:
I've heard some horses get sores on their lips from eating through plastic or wire.
These are easier to load than a hay net, so my barn owner does not mind loading them; it doesn't take her extra time.
The bottom has openings (some hay nets have solid bottoms) so dust and chaff don't collect for my horse to breathe in. Also, the horse can eat all the hay instead of losing some on the bottom.
Very safe design to prevent horses getting stuck or tangled.