Burn the edge off before the other dog appears
A Russell Terrier carries a working terrier's engine in a small frame, and an introduction attempted at full charge usually becomes a lunging, barking performance within sight of the other dog. Give him a proper outlet first — a long walk, a game in the garden, some training reps — so the first meeting happens when he can still think. Fit a harness rather than relying on a collar, because a Russell who spots something exciting will hit the end of the leash at speed. Then start the parallel walk at whatever distance lets him notice the new dog and still respond to his name.
Use motion as the calming tool for this breed
Russell Terriers settle through movement, so the parallel walk is not a preliminary to the introduction — for this breed it is the introduction. Walk briskly in the same direction, keep the route varied enough to hold his interest, and pay generously for check-ins: a glance back at you beside another dog is a Russell choosing self-control, and it should be worth his while. Let the gap narrow only while he stays loose and redirectable. A Russell who fixes, stalks low, or starts the high, tight barking that means he has stopped listening is over threshold, and the fix is distance and motion, not a closer look.
Keep greetings brief, angled, and on the move
When a Russell Terrier greets, the safest shape is a passing one: curve toward the new dog, allow two or three seconds of sniffing, then keep walking as though the meeting were a footnote to the outing. Standing greetings give a Russell time to escalate from sniffing to staring to snapping, while motion keeps everyone's arousal spread across the walk instead. Repeat the pass-by several times across an outing so the new dog becomes a normal feature of the landscape. Handlers should agree beforehand that nobody stops to chat while the dogs are close — human stillness is when terrier negotiations tend to start.
Remove the objects a Russell will argue about
No toys, balls, or food belong in early Russell Terrier meetings, because this breed's possessiveness over a valued object can ignite faster than handlers can react. A thrown ball adds a second problem: it triggers a chase instinct in a dog bred to pursue, and a racing Russell and a racing stranger are a recipe for a mid-chase collision of arousal. Keep early shared time object-free, feed the dogs entirely separately if they will spend time in the same home, and introduce any shared playthings much later, one at a time, with both dogs calm. If your Russell already guards items from people, raise that with a certified trainer before arranging dog introductions at all.
Repeat short successes until the new dog is ordinary
A Russell Terrier accepts a new dog through accumulated evidence that the dog is boring, so stack up frequent, unremarkable walks and resist the urge to graduate to off-leash play because one outing went well. Add a shared garden visit, then brief indoor time with both dogs occupied separately, and keep ending sessions before your Russell's patience frays into snapping. Lunging that does not improve with distance, fixation he cannot break, or any actual fight is the line where a certified trainer should assess the pairing directly. The household can keep this routine consistent in KinsLe, where Care Teams sets out who exercises the Russell first, who handles him, and how each meeting is meant to run.