Could be mate but it doesn't mean the sire or dam had anything wrong with em, it could be way back on either side, just one of them things I suppose.
I'm putting hers down to diet plus the fact she was rested for 2.5 months due to an injury. As soon a I got her of the gain and back out getting fit her coat getting back to normal.
How's Marley coming on, any pics you can pm at all ?