Well think about it, if you were at home minding your own business and then someone sedated you and when you started coming around you realized you were in a totally strange place that smelled like other animals wouldn't you be scared and grumpy too?

Did you bring things of his with him that would smell familiar like a bed or blanket. I'd keep him in a room with his things until he settled down and definitely go slow in introducing him to Sada and any other animals. Try your best to make this a positive experience for him - so far it's just been strange and scary.

Give him time and try to give him lots of extra attention.