Shedding of some grafts 10-11 months post op.. normal?

[Scorpian]

Is it normal for newly transplanted grafts to shed just 10-11 months post op??? And happen in groups and seemingly not come back in the same quality? Is this a typical problem with FUE? Would social drinking of alcohol (1-2 drinks maybe two nights a week) cause something like this to happen? Any thoughts? Would hair thickening products potentially cause this? If so, how?

[Scorpian]

Thanks Spex, but it's only been 10-11 months post op. Shouldn't these grafts take longer to shed? I don't know. I even noticed one site bleed after a light shower and the hair never returned there. How normal is it for grafts to be rejected 10-11 months out? Would Rogaine or other hair products cause it? How does one truly know if it's just seasonal shedding?