Leash Reactivity is when dogs bark or lunge at people and/or dogs on leash because they are either frustrated or anxious. To prevent leash reactivity from becoming an issues — teach your puppy or newly adopted dog to walk on a loose leash. Hit “like” and “subscribe” for more training videos. Go to www.legendsdogtraining.com for information about training services. Training by Alyssa Lapinel, certified professional dog trainer, based in San Diego, California.