ecollar

Hi all!   I have  just put this dog collar on my dog, because he has a sore underneath his belly. Our veterinary told us that is called ecollar, and suggested putting it on him,, . The case is that t,, he is extremely still since then, not want to move, or eat the prizes that I give him. He is laying down on the floor and he looks a bit blue . I’m trying not to make a big issue of  it, but t I wonder  if  this will pass or he will keep  in that way all day?, and what should I do to change his behavior?, ,as well  I’d like someone to tell me their experience with this kind of  dog collar, That  really would make me feel better!