I brought my husky in to my vet because i found some sores with scabs on them so my vet looked at it and said it was a skin infection and shaved half of his back and gave him antibiotics then after the sores returned i brought him to a different vet who said it was a Zinc deficiency after a blood test and told us to give him zinc supplements and the sores went away but his hair has not grown back for most of his back it has been 5-6 months any suggestions?

I am assuming you have created two accounts or someone else in your household has created an account also.

At 7 months old you could be dealing with the in between time when the puppy coat goes away and the adult coat starts coming in. There probably isn't follicle damage. The puppy coat was taken away prematurely by the shave and until the adult coat kicks in, which can be nearly a year old depending on where you are located, hair will be extremely slow to return. Also, if the infection or mange or whatever it was hasn't been fully taken care of that will also slow down or even roll back any progress in growing the coat that might be had.