Jasper and his mini-me mate E: I thought I knew Jasper inside out, but I saw a new behaviour last week, when E, his 'sister', and my friend L came back for a coffee sitting in the garden in the glorious (but worrying) weather after a walk. Jasper has never had any problem with other dogs visiting our house (once they've been introduced), as long as they don't approach him when he's on his bed. And apart from one very brief spell in his youth when he didn't like other dogs coming up when I was giving him a treat, he's not shown any jealousy or guarded me on walks. But when E jumped up on the bench next to me, J immediately stuck his nose in between us and was a bit agitated, sniffing E as if they'd never met before. It was pretty low key, and L hadn't noticed, but it was enough for me to suggest she stop petting J... I encouraged J to move away and encouraged E off the bench, and all was fine again. A little later when I was standing on the patio, E jumped up on my leg to say hello and J was there again, sniffing E's nether regions and shoving his nose in between us. He then looked like he was thinking of humping E. Again, it was all defused easily, and I was proud of J that he hadn't got more grouchy. It was more of an 'Excuse me, E, what do you think you're doing?' I don't think we've ever had a small dog, of the type/size to jump up on the bench or on me, over before, so I guess it was a new thing for J. Every day is a school day!