First Reason: Street dogs may cry at night They might be hungry as they have less access to food and water.
Second Reason: Street dogs often live solitary lives and due to this lacking the companionship they naturally wants.
Third Reason: Street dogs establish territories and conflicts with other dogs.
Fourth Reason: Dogs might be having Physical injuries that can cause distress in street dog
Fifth Reason: Street dogs may cry in response to environmental factors as they have to face many weather conditions