I had a friend who owned and bred Yorkies and Yorkie/Shih Tzus. They have high prey drive and yes.. are smaller than a cat.<br /> <br /> EDIT: Then again, I don't understand what size has to do with it. Look at dog breeds that are trained to kill/take down larger animals:<br /> American Pit Bull Terrier<br /> Bulldog<br /> Irish Wolfhound<br /> Akita Inu<br /> Shiba Inu<br /> Fox Terrier<br /> Patterdale Terrier<br /> Borzoi<br /> Catahoula Leopard Dog<br /> Norwegian Elkhound<br /> Jindo<br /> Karelian Bear Dog<br /> <br /> Yorkies were and still are used for ratting and pest control. They're tenacious, fast, aggressive little dogs when they want to be - never underestimate a dog because of its size.<br /> <br /> What Tiger says is true. Making sure your dog knows that your other pets are above it is VERY important and that nipping/chasing/wrestling with your other pets is not tolerated <b>under any circumstances</b>. Your dog should regard your other pets like kings, never let him/her mess around with them.

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Your average cat, at 10lbs, is larger than a Yorkie (breed standard states they must not exceed 7lbs)...<br /> <br /> Your puppy must learn to accept your cats as boss.

Young puppies need to be taken out every 20-30min if you dont want an accident on the floor. <br /> <br /> Once they are a few months you need to take them out every hour.<br /> <br /> Then around 6+ months you can take them out every 2hrs. <br /> <br /> They are a real pain as tiny puppies xD. I love when they are 6-8months. Best age ever for them xD

<i>The longest it will be left is 3/3and a half hours.</i><br /> <br /> Are you aware that puppies (depending on their age) need to be taken outside for bathroom breaks a lot more often than that?

Hes bigger than a yorkie, more the size a jack russel/ bigger than average. Plus they will have a room to themselves, will that help them

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Doesn't matter if your cat isn't that small xD. Mine are normal cat sizes and they still stir up my border collie. There is no way you'll get your dog to not see them as an animal.<br /> <br />

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ok. My cat is not that small. The other has common sense with keeping out of the way, so should i try get to dog to see the cats as a freind not animal? <br /> We mostly have some one at home. Rare buisness trips away but even then some-one tries to be at home. The longest it will be left is 3/3and a half hours. My dad runs so does my mum, (occationaly) we think the dog will get around 3 hours of exersise a day if it needs it. plus i plan on training it =D

I own a border collie and we have to keep her separate from the cats or she'll corner them :/ I'd be careful about herding breeds with smaller animals.<br /> <br /> Also my dog had health issues which made her overweight but when she was healthy, she needed a lot of exercise or she chewed our wood framing :/

<i>"We want an active dog that is easy to train, partly to do with the cats, and loves people."</i><br /> Are you prepared to work the dog? I don't mean throwing it a stick or taking it for a 30 minute walk. I mean are you willing to do a lot of strenuous activity every single day?<br /> Collies have a ton of energy and need to be exercised a LOT or they'll just go nuts. This is the same for any high-energy breed.

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Lol my cat would not be impressed with that. The collie would herd the cat would hit...