Why the introduction matters so much
First impressions between animals are lasting. A bad first meeting can establish a negative dynamic that persists for years. Getting it right does not guarantee they will be best friends, but it dramatically reduces the risk of permanent conflict.
New dog + resident dog
Before the meeting: prepare the space
- Remove or separate high-value resources: food bowls, favourite beds, toys. Most inter-dog conflicts start around resources.
- Exercise the resident dog before the meeting β lower arousal means a calmer first encounter.
The first meeting: neutral territory
The best first meeting happens on neutral ground (a park, a field) β not at home, where the resident dog may show territorial behaviour.
- Bring both dogs to the neutral location with a handler each.
- Start at a distance β let them see and smell the environment.
- Walk in parallel (not head-on) β same direction, gradually closing the gap.
- Allow a brief sniff β 3β4 seconds maximum β then break it off and continue walking.
- If there is high arousal: increase distance. If there is calm: repeat the sniff and move on.
At home: the first days
- Separate spaces initially β baby gates or different rooms.
- Scent swap: each dog's bedding goes to the other's space.
- Full supervision during all in-home contact for the first weeks.
- Never force interaction β each dog sets their own pace.
- Feed in separate spaces for at least the first week.
New dog + resident cat
This introduction takes longer and requires more respect for the cat's pace. The cat must always have an escape route and elevated spaces the dog cannot reach.
- Week 1: complete separation with a door between them. Scent swap under the door.
- Week 2: let the cat explore the dog's space without the dog β and vice versa.
- Week 3+: first visual contact with the dog on a lead and calm. The cat decides whether to approach.
- No chasing allowed: the dog must be interrupted immediately and calmly the moment they begin to chase.
Breeds with strong prey drives (Huskies, terriers, sighthounds) may not be safe with cats even with excellent training. Assess each case individually.
Signs of progress vs. warning signs
Progress: mutual ignoring, sleeping near each other without tension, relaxed play.
Warning: intense chasing with no play quality, fixating stares, persistent growling, changes in eating or sleeping patterns in either animal. If these appear: step back in the protocol and consider professional guidance.