I'm so sorry....we've had members here with dogs that suffered this condition.
You may want to ask a moderator to move this to the "health" section of the forum.
The reason I suggest that is your thread may get more responses and suggestions in that section as this is the 'puppy behavior' section.
I hope someone can give you supportive advice that helps your dog!
Smitty (rescue) Ilda WGSL 4/28/10 Autumn Australian Shepherd 10/9/11 Stihl Bonafide von Nadar WGSL 3/23/15