Each dog is different and has different sensitivities or anxieties, building a trusting relationship and understanding of the animal is a key priority. If walking your dog, I have a 15m training line that I would prefer to keep attached to your dog until I am confident in their recall, both for their own safety and the safety of others. My own puppy, Lyla, can be very excitable and sometimes is a bit much for other dogs. She is always kept on a training line around other dogs until they have developed an understanding of each other. If your dog is showing signs of being uncomfortable with Lyla around, she is well crate trained and so can be kept separate from/walked separately to any other dog that is in my care.