This could also be GME or Necrotizing Encephalitis. My dog Gidget had some of the same symptoms. To diagnose it they typically do a MRI or CT Scan and a spinal tap and unfortunately it is costly. Here is some information on the disease, if it is GME or Necrotizing Encephalitis it is important to get help fast.
Dr. Sisson has been helping a lot of us who are a member of a GME Support group either consulting with our neurologists in our home states or in some cases people have traveled to him in Boston. Below is all the information, please feel free to contact me with any questions.
GME Support Group
NewGMEDogs : NewGMEDogs
Neurologist in the Ohio area:
Page Title
Dr. Sisson Website
MSPCA-Angell:
NC Website with information
Veterinary Teaching Hospital :: North Carolina State University College of Veterinary Medicine
I pray that your baby doesn't have this it is a horrible disease but there is hope if you act fast.