Wireless Fence I Have A Four Month Old Weimaraner Puppy. Is It Safe To Use The Petsafe Wireless Fence On A Dog That Young?

I have a four month old weimaraner puppy. Is it safe to use the Petsafe wireless fence on a dog that young? - wireless fence

I am currently with the Petsafe wireless fence for adult weimaraner and worked very well. I do not know how old my new puppy needs to get to the neck.