"Look at all the breeds of dogs around,"
Sigh.....
Yes, I'm looking and this has been stated 1000000 times. They are still DOGS.
This is not evidence of anything.
I suggest you read Darwins "The Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life".
It will better inform you concerning the topic in discussion.
