My boy Sunny would howl on cue. We had a little "howling song" that we would sing, and that set him off. Also, the phrase "you're only a dog and that's all you'll ever be" would result in instant howling! And once started, he would continue. I have a video where I picked him up and held him upside down, and he continued to howl!
250 dogs seized from puppy mill in TN
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http://www.spartaexpositor.com/articles/2009/02/11/news/doc4993275c1f6b8789629348.txt
No Basenjis.
Please watch the video to see the horrible living conditions and the rescue efforts by local authorities and SPCA.