But I'm not sure where to begin with helping her. Backstory, she's a 2.5 year old mix breed of some type that we rescued at 6 weeks old. When she was about 7 months old and we were out walking she was attacked by an off leash dog. The dog broke its collar, charged her and I did my best to stay in between her and the attacking dog. The owner had his hand bitten by his own dog while trying to get it away from us. She didn't get bitten or suffer any damage. Shortly after that she started showing some reactive behavior at the dog park. With some dogs, she was fine but with others they'd run up to her and she'd make this screamy bark and run them off. We still attended for a while to meet up with her dog park friends that she didn't do this with. We stopped going altogether after we moved to another city. She has no issues with our other two dogs, we don't do on leash greeting so it hasn't been a problem. Recently we moved rented the other half of our duplex to a couple with 2 dogs. Lottie gets along great with their 13 year old yellow lab, but has been reactive with their 10 year old pug. Twice now Lottie has barked at the pug and run her off when she gets too close to Lottie. I warned them before they moved in that Lottie was not dog friendly. Not dangerous, but not dog friendly. Today they came out to the yard with both of their dogs while my husband had the dogs out to potty and actually called our dogs over to play. I wasn't outside with them, but at some point Lottie barked at the pug and scared the owners. There was no biting or snapping, but now they seem to think Lottie is some dangerous dog who attacks small animals and shouldn't be trusted with children. Which just makes me angry because she loves kittens and does great with kids as young as 2. Anyway, I know it is our responsibility to keep Lottie safe and out of situations that make her uncomfortable like this. I've been begging my husband to build a fence so that we can better control our dogs since we can't control other people and whether they choose to allow their dogs to walk into our half of the yard. I don't know if it's even possible to help Lottie learn to be comfortable around other dogs. I am able to read her subtle signs that she's uncomfortable but most people are not. Is this something we need to see a behaviorist for? I don't see how we could break the behavior with just training and not being around strange dogs. I know of a Feisty Fido class at a training facility but I wasn't sure if that would really help this specific behavior. On leash she's wonderful, but I don't allow other dogs in her face. She's attended obedience classes, trips to homedepot with lots of other dogs, etc. She doesn't really have a problem unless there's a dog within 2 feet of her.