If you have just a few goats and want to grass hay feed them you could do as I did when I had four meat goats and 4 acres of wind sown grass hay from the cattle ranch around my place and more time than money.
I let the grass acreage grow to about 3 to 4 feet and then took my battery powered weed wacker and started wacking it down from the outside in concentrating on wacking an 1/8 of an acre per weed wack section.
I then raked it up onto my flat utility wagon to bring up to my 40 x 40 garden shed to lay on chichen wire to further dry and then shock bundle with some braided grass twine to dry stack in the shed.
Between feeding grain feed , the shocked hay and staking the goats around my property on stake chains I was able to fatten the original three and increase the number to six over the next two and a half years while using them as landscape tools also.
When we slaughtered them for barbecuing the meat was so lean and tender.
A few years later when I bought 4 more I just grain fed them and used them for lawn care tools to grass feed them for one season before slaughtering.
Shock bundling and loft piling hay was the practice before modern baling.