Think of a Famous Dog.

[Taz_Zoee]

Well I could only get one.
Rin Tin Tin - A

But there are 18 names and only 17 descriptions.
I looked up Bush's dog and they are/were Barney and Spot.

Good luck, and welcome to PT.

[IRescue452]

Rin Tin Tin

So brave is Corporal Rusty.
Though he is just a boy.
How true as Private Rin Tin Tin
They are the army's ride and joy.

Yo Rinny, Yo Rinny
Pals through thick and thin.

From all the tales of the west
We'll remember best
Corporal Rusty and Private Rin Tin Tin.

Yo Rinny, Yo Rinny
Pals through thick and thin.

From all the tales of the west
We'll remember best
Corporal Rusty and Private Rin Tin Tin.
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Rex = Bush's dog? http://www.usatoday.com/news/washing...on-guest_x.htm
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All I know about famous dogs named Brutus is that there was a doxie named Brutus who was a skydiving dog, and a great dane named Brutus in a disney film.
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Ol' shep, so far as I know, was either a collie, or an elephant from George of the Jungle.