
Hi Lindy,
It seems that, unintentionally, your dad gave your dog a real scare. :( Especially if she's not confident with men anyway.
One way round this is to get your dad doing all the nice things with your dog - feeding, walking etc. Another is for your dad (and all of you) to completely ignore her 'bad' behaviour and only acknowledge her presence when she's quiet. When your dad walks past her he could try dropping a titbit onto the floor, without slowing down or looking at her so that she starts to think that him moving towards her could be a good thing.
Hope one of these ideas helps.
:)