Hi everyone! Long story short: My friendly 2 year old lab mix chased after another dogs ball which caused a dog fight. There was no actual bite and no injuries to either dog. My dog ran straight for the ball and the other dog ran into the right side of my dog to get the ball. The fight was very loud and my dog was alot bigger than the other dog. It lasted about 10 seconds and I immediately leashed my dog. The other dog was very upset and the dog's owner was (understandably) furious. She started screaming about muzzling and keeping my dog on a leash. I left the park immediately and was absolutely shocked and distraught. My dog is extremely social with other dogs and has never behaved like this. She is great at reading signals from other dogs and knows when to back off. Other dog owners usually recognise her and are happy to see her. My dog has also never chased after a strangers ball before and I think overexcitment might have caused this? Moments prior to the fight we had spotted my relative jogging in the park (a person she has never seen outside our house before) and my dog became extremely excited. I was also momentarily distracted by the relative that I hadn't noticed the other dog owner had entered through a side gate. I usually monitor every move my dog makes and don't allow her to approach dogs that are too small for play. The actual ball itself was also one she had never seen before, it was very bright with tassels on it. It was also thrown pretty close to where we were. I'm not making any excuses for my dog and absolutely accept full responsibility. I wasnt paying enough attention and my dog should never have run for another dogs ball. This might have been a one off accident but it was very scary for me. I worried with her size she could have really hurt a small dog. I want to prevent anything like this happening again. This is the first dog I have owned as an adult and I'm trying my hardest to learn everything I can. Her safety is the most important thing to me and I really don't mind muzzling her if I have to. I've already started started muzzle training and I'm looking to hire a behaviourist after cov-19 dies down. I'm not sure how to immediately approach this. I haven't taken her back to a park since. If I were to take her, should she be kept on a lead? Is a muzzle a good idea? Can she still play with other dogs? Any help or comments at all would be very helpful. Thankyou for reading!