Our 3 year old Yorkie, Jojo, seems very upset and not himself lately. He has thrown up 2 times in the past week, and just looks sad. Has anyone seen this, maybe he has a cold or is just in a bad mood lately. How can I cheer him up?

He certainly needs it!
And he sleeps all the time, I am sure every Yorkie does,but, I just hope I have no cause for concern.
Thanks!