"The situation is one every dog owner will relate to: your pet bounds up to you, barking enthusiastically, yet you have no idea what they are excited, or worried, about — and wish desperately that they could talk.
While our dogs love us unconditionally, follow us around, play with us and depend on us emotionally and physically, we know very little about what goes on in their minds. Worrying new research suggests our ignorance might be making our pets miserable."
Read more: http://www.dailymail.co.uk/news/article-2011292/What-dog-trying-tell-eyes-wagging-tail.html#ixzz1RFfpyowq