What do the following animals have in common?

CAT

BULL

GOAT

HORSE 

RABBIT 

(BIG) HINT:

Bear and mouse could be added to the list.

Answers:

 

Each animal can be preceded by a male name:

 

TOM CAT

JOHN BULL*

BILLY GOAT

CHARLEY HORSE

JACK RABBIT 

(Teddy bear - Mickey mouse)

*JOHN BULL is the English equivalent of America's John Q. Public.