Hmmmm
Stop using the collar, PLEASE
And attend on a dog course instead...and it is urgent, no time to lose !!!
Call the club today...
And I think you are to have the dog in lease for now...
Is this your first dog ??? and did you atend on a puppy course ???
And have you talkt to your Breeder about this problems ???
Maby she/he can help you, or take the dog back if you can not get this problem under control ???
Good Luck, regards / Mikael