First off you need to move them off the field before they kill the grass underneath! Where they baled wet or just been rained on since? How long ago was it since they were baled?
If baled wet recently you could get them wrapped as haylage, if baled dry and rained on they may dry ok once under cover (but don't stack them). Otherwise take them to the corner of the field, cut the string and make compost which you could spread back on the field in spring or have a killer bonfire party.
Generally most years I end up having to dry a couple of hundred small bales that didn't make it in before it rained and if dried properly you'll never know which was which.