How do you know if new dog is not going to hurt cat?

It's impossible to guarantee that a new dog won't ever hurt your cat, but there are steps you can take to drastically reduce the risk:

Before Bringing the Dog Home:

* Research Dog Breeds: Certain breeds are generally known to be more tolerant of cats (e.g., Golden Retrievers, Labs), while others might be more prone to chasing or hunting instincts (e.g., some hounds, terriers).

* Meet the Dog: Spend time with the dog before bringing it home, preferably in a neutral environment, to assess its temperament and how it reacts to cats.

* Talk to the Shelter/Breeder: Ask about the dog's history with cats and any relevant information.

Introducing the Dog and Cat:

* Gradual Introduction: Do not rush the introduction! Start with slow and controlled interactions. Keep them separate for the first few days, allowing them to get used to each other's scent.

* Controlled Meetings: When you do introduce them, supervise closely, and keep the environment calm. Let them sniff each other under the door for a few days before allowing visual contact.

* Positive Reinforcement: Reward good behavior with treats and praise. When the dog ignores the cat, praise it enthusiastically.

Ongoing Management:

* Safe Spaces: Ensure your cat has high, safe spaces it can retreat to if it feels threatened. This could be a cat tree, high shelf, or room specifically for the cat.

* Separate Feeding and Litter Boxes: Avoid feeding your dog and cat in the same location to minimize competition. Likewise, ensure they have separate litter boxes.

* Playtime: Engage the dog in stimulating play to tire it out and reduce the likelihood of chasing instincts.

* Training: Train your dog to "leave it" and "stay" to help with controlling behavior around the cat.

Signs of Stress:

* Tail-chasing: The cat may flick its tail back and forth rapidly.

* Hissing: A common warning sign, this means the cat is feeling threatened.

* Flattened ears: A cat with flattened ears is likely stressed.

* Dilated pupils: This is another sign of stress.

* Excessive grooming: Cats may overgroom when anxious.

Seek Professional Help:

* Professional Trainer: If you're struggling, a professional dog trainer can help with training and behavior modification techniques.

* Veterinarian: If you see aggression or signs of stress, consult your veterinarian for advice and potential solutions.

Remember: The key is patience, consistency, and positive reinforcement. It takes time for a dog and cat to learn to live together peacefully. If you are committed to making the introduction work, it is possible for both animals to live happily and safely in the same home.