How does it work? You just soak them strain them out and they sprout?If OP has that small a flock, she may still find that buying a 50# bag is cheaper, b/c the reamaining portion that she does not sprout can be used instead of scratch, or it can be used as a green manure crop in the garden, or it can be planted in the run or a dedicated garden bed for the flock, or she can split the bag with a friend. It wouldn't take very many trips to the health food store to buy sprouting grains before she's spent the equivalent cost of a 50# bag of grain. And if she feeds wild birds, she may already have a start of sprouting opptions: millet, and BOSS.
I sprout for my flock in 1 qt large mouth mason jars. You can buy a 3 piece plastic sprouting lid set to fit the jars, or simply use a piece of window screening, or needle point plastic cut to fit inside the jar ring. Your collander is also a nice option. I keep 2 jars going all the time, but may need to add a third.
Thanks
Gary