Why does are female English mastiff lay on her back and open legs for other dogs to smell everytime she see another dog?

It's important to remember that dogs communicate differently than humans. What might seem strange to us is perfectly normal and often necessary for them.

Here's what's likely happening with your female English Mastiff:

* Scent Marking: Dogs, especially females, will often "present" their rear end to other dogs for scent marking. This is a form of communication, allowing dogs to learn about each other's health, reproductive status, and social standing.

* Reproductive Cycle: If your Mastiff is in heat (estrus), she's likely inviting attention from male dogs. This is part of the natural process of reproduction.

* Social Greeting: Even if your Mastiff isn't in heat, presenting her rear end can be a way of greeting another dog. It's a way for them to "say hello" and exchange information.

Important Considerations:

* Spaying: If you're not planning to breed your Mastiff, spaying can eliminate her heat cycles and reduce her urge to present to other dogs.

* Training: With patience and positive reinforcement, you can train your Mastiff to be more respectful of personal space, especially with other dogs. This can help avoid unwanted interactions.

* Socialization: Early socialization with other dogs can help your Mastiff learn appropriate social behaviors.

Remember, it's important to understand your dog's behavior and needs. If you're concerned about your Mastiff's behavior, it's always best to consult with a veterinarian or certified professional dog trainer for guidance and advice.