Actually dogs have no particular fondness or hate towards people, it is the memories of pet owners that may recall the one bad example the Mitt Romney committed towards his pet dog.
Ann Romney loves her horses and maybe the Romney family when it moves to the White house will have a horse stable? Maybe the White House garden will be changed to build a stable? Or maybe the same stables used in Washington DC will house the parading horses and Ann Romney's horses? Basically under different Presidents, different animals and projects get emphasis.
Cats are probably fuming this year that there are no Presidential candidates promoting cat ownership. Wasn't Socks the cat the last famous cat? Socks was adopted by the Clintons in 1991 after he jumped into the arms ofChelsea Clinton while she was leaving the house of her piano teacher in Little Rock, Arkansas, where he was playing with his sibling, Midnight. Midnight was later taken in by another family.http://en.wikipedia.org/wiki/Socks_(cat)
The Kennedys had ponies and horses and maybe Lyndon Johnson got his hamsters from the Kennedys?The Kennedys were the champions in owning Presidential pets.