Animals show stress in different ways, so it is a good possibility that he is just overwhelmed.

You'll have a better idea as you watch him over time.
It's good that it seems to be subsiding, though.
-----
Maureen's furry pack:
MoJo (THE Shiba Imp)
Risa (Chocolate Demon Child..I mean Lab)
Pyewacket (Bengal Cat)
R.I.P. Kitties: Cricket the Tabby and Puff the Russian Blue
www.scottsbt.com/maureen/mo2.htm