2 yr old Border Terrier, had him since 5 months old - he came with issues but we've done lots of training and have seen good results.
The biggest problem remaining is that he's very territorial, so we keep our front gate bolted and manage visitor entries carefully - he's always fine when people are actually in the house, but he barks aggressively in the garden.
We have a trellis fence on the boundary with our neighbour and our dog will run to the fence and bark when they appear. Today my husband went to bring our dog back indoors and as he got close the neighbour reached down his hand and our dog tried to bite him through the trellis. Neighbour whipped his hand away quickly and said 'I didn't expect that!' - husband was mortified and apologised.
This has never happened before, I've always thought it was 'bark but no bite' - although we don't take chances, hence the locked gate.
I feel so disappointed. My previous BT loved everyone and I can't get my head round having a dog that might actually bite somebody.