I have raised and adopted Maremmas for poultry guardians and had great luck. Yes the pups need to supervised till they are older, for Maremmas that seems to be 14 to 16 months of age. They should have livestock around them, and lots of time with them while your watching, but never allowed to think of them as playmates. A few older roosters would be great training aids, I wish I had some when Neve was a pup. The older dogs I have rescued I just introduced and they have been great. I have now also rescued an English Shepherd and he was interested in chasing the chickens only till he got told NO! After I caught one and let him sniff it all over, then told him Good, NICE! every time he looked at them calm he had it. He was a city dog and had never been with livestock to guard but his instinct is intact. It's great to see the chickens run toward my dogs when they feel a threat, or see the snuggled up to a nice warm dog in the hay in winter. The time you put into raising one of these pups will be well worth it. If you can take on an older dog I would suggest it, I am really glad I had the older one to start. I disagree that they have to be raised with poultry to guard them, 3 of my dogs now have not had poultry before they came here. LGD instinct seems to be very strong to guard that which belongs at home. None of my dogs knew cattle either but when a sick one needed to come here for a week while it's owner was busy they took my word that it belonged and guarded it. They were reluctant to let the owner pick it up.