The silent dog: American taught your pet to bark silently
24 year old American Brian Gertler taught his dog Dudley to bark quietly.
This is stated in the story “snidanok z 1+1“.
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According to the guy, he had to make due to the fact that he lives with a dog in the hostel. The dog constantly barked and thus interfere with others.
Brian says, training the dog spent a lot of effort, but the neighbours were to him in the first place.
Recall that in Scotland in the family of Louise Sutherland Golden Retriever Rio birth to the light green puppy. Later, the vets said that it happens, but this phenomenon is very rare.