Do you mean a separate company?
Of course not, they have their own people. Why spend extra money getting someone else to do it for them?
So what I'm saying is basically as soon as the company decided to go with dragons, all of the teams in different departments was effected, they may have had a separate team for dragons but ultimately every team had to work on dragons in one form or another.
Well that's certainly not true. About the only team that would be involved with the dragons would be the Art and Animation people, with some input from the AI team. Why would someone working on the interface, or quest design, have to stop what they were doing in order to work on dragons? They're just another creature that will populate the game. Do you think that Oblivion lost out on something just because they decided to create a Nether Lich to battle you, or Spider Daedra? Your reasoning just doesn't make any sense.