worried about sneezing.

I just got my hegdehog about three weeks ago and he has had this "huff" ever since. The breeder I got him from mentioned that it started only when he was separated from his mother and put into his own cage. He was brought to the vet and as a precaution put on antibiotics but he has been finished with the meds for two weeks now.He does not sneeze when left alone and seems to be eating okay for a baby ( his water intake seems slower then average but this is my first hedgehog) When handled he will sneeze and lick his nose, sometimes he will appear to have a runny nose but like I mentioned before this is only when he is agitated. One other strange side note is that he has never once curled up into a ball like all hedgehogs do and I am curious if some cannot. If someone could please give me advice or share if they have had the same experience, I Dont want to worry