Got a new beddy/ whippet pup, 7 weeks old. Introducing it to my terriers, bit by bit, but 1 of them is being a real pest; he's a 6 year old border. We sent all the dogs out and just left the border and the pup in with us, he was licking the pups face but looks very jittery and tense. I didn't think for a minute, that an adult dog would be dodgy with such a young pup. At the moment, we've got them seperated by a mesh panel in the living room; so they can see and smell each other. To be honest, they're mostly ingnoring each other, it's just when they get let in together. I've never had a problem