A feeding rack / -container or bale ring helps to give the animals a routine, with an always available feeding and therefor a natural living and gathering. This applies to both outside and inside.
It avoids feed wastage and mess with the feed, and it is also one of the main reasons of using feeding racks that all animals, without exception, from having ad'libitum - access to straw feed in one form or another. First of all for health reasons.
There are many different types - see the different types on the left menu, or call and talk so that we can find the exact type that suits the needs your animals have best.