[TASMANIANRED]

There is a huge variety in the the amount of smell receptors that dogs have. Little pushed in face dogs have fewer and the long snouted ones have more. Also the olfactory center in a dogs brain is about 4 times larger than a humans.

I good whiff of something good and stinky is the equivalent of a novel to a dog. They know about where you went, what emotions you experienced, what you ate, if you are healthy or not, if who you visited was healthy or not, they can tell intention by the aromas someone gives off..

The next time your pooch sticks his nose up a visitors butt and embarrasses you, just soothe your injured ego with this:
Your dog probably knows more about a visitor in one good sniff than you could find out in a year.

[Happygal]

What does it say about me, the next time my neighbours dog wraps himself furiously around my leg and tries to hump it?

[investigateworld]

Your info is totally correct. re: man's best friend. They are always thinking of the welfare of the "pack", i.e. allowing a stranger to bring in disease etc. Great Post!