In my game the frequency of dragons is dictated by how hard the players search for them. I have also house ruled that only one in twenty dragon eggs will produce a "true dragon" all the rest range in size from ferrets (the majority) to suitable sizes for steeds, (the minority). My players chose not to go on the exotic pet market quest.
In three and a half years of game time the group has only came across three dragons. A fat greenish yellow one and a pair of incesteous black dragons that are trying to produce a two-headed hatchling.
In three and a half years of game time the group has only came across three dragons. A fat greenish yellow one and a pair of incesteous black dragons that are trying to produce a two-headed hatchling.