I keep emails conversations private with the individual owners. Once pups are sold, I ask if the owner is open to sharing their contact information with other puppy owners - in case they live near one another, and want to get together for a play date. Most say yes, some don't reply. I do share photos of the pups from the litter (without contact information), since most buyers spend enough tome with the litter before pups go home, and connect in someway to the other litter mates - people are curious how litter mates are doing, and growing.