hi andy, imo 3 acres is not a lot really especially if some of it is bog, once the pigs hoke it up it will take longer to recover, your best bet is to try and drain it see how it goes, sheep will be fine especially if they have access to bog and green land, your going to be very limited with numbers 2-3 acres ,so id forget the sheep idea, its quiet wet here also, keep that in mind, iv set aside 10 acres for my pigs to hoke up 2 acres,level reseed move to next 2 acres and then let sheep into first 2, etc etc, my point being 2 sows and say 16 young wont be long hoking,