1. **Stiff Body Language**: If a dog stands rigidly with a tense posture, it may be a sign of aggression or discomfort. Look for a straight tail held high, and a stiffened neck.
2. **Growling or Snarling**: Vocalizations like growling or snarling can signal that a dog feels threatened or is warning another dog to back off.
3. **Baring Teeth**: If a dog shows its teeth, this can be a clear sign of aggression. It’s a warning that the dog is not happy and may bite.
4. **Direct Staring**: A dog that is fixated on another dog with a hard stare may be feeling aggressive or challenged. This is often seen in dogs that are feeling territorial.
5. **Ears Pinned Back**: While not always a sign of aggression, ears pinned back can indicate fear or discomfort in a dog, which might lead to aggressive behavior if they feel cornered.
6. **Tail Position**: A tail that is raised high and stiff can indicate aggression, while a low, tucked tail often indicates fear or submission.
7. **Lunging or Snapping**: If a dog lunges towards another dog or snaps without much warning, this is a clear sign of aggression.
8. **Excessive Barking**: While barking can be a normal part of dog communication, excessive barking during introductions can indicate stress or aggression.
To ensure a safe introduction, always supervise and control the environment. Use positive reinforcement to reward calm behavior, and if you notice any signs of aggression, it's best to separate the dogs and try again later in a more controlled manner. Gradual introductions in neutral territory can also help reduce tension and promote positive interactions.
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