Hi,
He's always had some stranger danger issues. He does not want to be touched by strangers on walks. Does not like them in the house. He is perfectly fine walking past them on walks, even brushing against them once when I slipped and pushed him a bit, as long as they don't try to touch him. We put him away when strangers are in the house. So, his quirks is that if there is another dog anywhere in the vicinity, strangers are no longer an issue. They are beings to be loved and who will give him treats and cuddles. You have a dog? Sure, you can walk into my yard unannounced and I will love you and rub myself against you. No hesitation. Our neighbors had a party in their yard and there was three dogs there, and Ralphie joined the fray without hesitation. He was pushing toys into people's hands, begging for food, crawling into laps if people let him, stealing the yard game toys. Nobody would even think for a second he had stranger danger issues. He did not give any stress signals, and wanted to go back and have fun when we left.
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