This is not something new on cats and dogs. This is something which most would have observed.
Some like cats and some like dogs. Very strangely, few like both of these and have in home as pet animals.
During my childhood days, myself and my sister wanted to have pet animals at home, but my mother does not like pets at home. Luckily we got chance to grow cats at home for some time and observed dogs at neighbor house.
Initially I liked cats over dogs, reason was simple. cat keeps the environment clean, where as dog makes it dirty.
Both the animals move close with humans, but what they think is different.
Cat Thinks:
They pet me, They feed me, They shelter me and they love me. I must be God.
Dog thinks:
They pet me, They feed me, They shelter me and they love me. They must be God.
After observing this, I started to feel Dog was better, as it is loyal to master, showing love and affection, and despite that it helps in alerting in danger etc.
I feel that , humans also think like cats and dogs. Mostly human think like Dogs and few think like Cats.
If you don't agree with me, then you belong to the cat way of thinking :-)
-- Dhanesh Amma