Telula is a very lucky little girl to be in your loving care now.
Be patient with Cedric. Maximo was jealous when we brought his 8 month old brother home. He liked Teddy, but didn't want us picking up Teddy or showing him attention. Some things were worked out in the first couple days, others took a couple of weeks, and the last hurdles took a few months (like sleeping in the bed together).
Make sure you put Cedric first for everything -- greeting him, giving treats, putting food bowls down, and so on. Take Cedric for walks or outings alone with you and give him extra attention.
Intervene only when necessary for safety or truly bad behavior. Otherwise, let the dogs work things out among themselves and just try to gently direct their attention toward positive activity. Doing things together like trick training and having chews and walks helped my guys bond.
Best wishes!