Eko does this noise ALL the time. Especially when he gets petted! If this is the wrong place I am sorry, I didn't know if I could put videos in the pictures place.
The video quality is not great, I took it on my phone but it was more about the sound anyway.
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Mr. Eko 2/14/2012 - My first GSD and my little Romeo
Xena 11/30/12 - My first APBT and my little warrior princess