We have a cat that weighs over 20 lbs and is the ruler of the house ... or was until the Yorkies arrived ! Tigger has mellowed to the point of being rediculous as he lets the yorkies climb all over him , chew his ears and generally be pests at all times . DH was very worried about bring the first pup home as this cat was always a bit agressive ( though he had been raised with 2 cockers ) and an indoor cat .......... has turned out great ....unless you count the midnight rattling of the Yorkies kennels by the cat because he wants to play
and you know what Yorkies do then ....they BARK and bark !!! LOL! Good luck !