We have three dogs and they are so different in shape, size and color.  Do you know much about dogs as pets?
Not as much as I would like to! Is there something you can share on the issue?
Sure!  Dogs are the first species to be domesticated and selectively bred for behaviors, physical attibutes, etc.. It's interesting how the different breeds have evolved.
wow I did not know that! Its pretty amazing
was the first species to be domesticated and has been selectively bred over millennia for various behaviors, sensory capabilities, and physical attributes.
Their long association with humans has led dogs to be uniquely attuned to human behavior and they are able to thrive on a starch-rich diet that would be inadequate for other canid species. Dogs vary widely in shape, size and colors. They perform many roles for humans, such as hunting, herding, pulling loads, protection, assisting police and military, companionship and, more recently
caused by selective breeding can be seen in pets such as koi fish and betta fishes which is bred for aesthetic purpose or dogs bred for extreme physical appearances (e.g. extremely short snouts in pugs or bulldog species, short limbs on dachunds, extremely small sizes in "teacup dogs"). Extreme physical appearances in selectively bred animals may cause health problems, which may cause wild ancestors to have longer natural lifespans. 
Wild ancestors and their domesticated counterparts. Differences Behavioral.
Behavioral differences in wild ancestors were caused by differences in brain