Yesterday the pavement was empty. Today a large bin sits beside a parked car, and your dog stops and barks. You know it is only a bin. Your dog knows it is a new shape where they did not expect one.
Give them distance instead of pulling them toward it. Walk in a gentle arc or cross the street where safe. If they can look at the bin, take a treat, and then sniff the ground, reward that calm observation. If they freeze, bark harder, or cannot turn away, go farther. There is no deadline for them to touch it.
Let curiosity do some work
With an object you can place safely in a quiet area, set it far away and let your dog notice it. Reward looking and choosing to come back to you. You may take a small step closer only while your dog remains comfortable. They can choose to investigate, do not lure them into reach and then move or bang the object. Change movement, distance, and sound separately.
On real walks, you may simply go around unfamiliar bins, bags, or construction signs. Passing calmly at a distance is useful progress. If your dog develops a sudden broad fear of familiar objects, seems unable to see or hear normally, or remains very distressed, ask your veterinarian about health and sensory changes. A qualified, reward-based behavior professional can help if fear makes ordinary walks difficult.
A bin is not worth a showdown. Help your dog discover that moving past it is safe. If ordinary objects keep making walks hard after a health check, the reactive-walks guide offers more on giving your dog room to notice and move on.
Sources: Karen Pryor Academy: Helping Dogs Overcome the Fear of Objects. Humane Society of Sonoma County: Desensitization.