Do you know any thing about toy/teacup poodles?

No such thing as a teacup poodle..

Don't you people read the suggested questions when asking a question?
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number 1 they are tiny
number 2 they look exactly like poodles and
thats all i really know lol
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go onto the internet and email a breeder and see what she says an older dog wont hurt anything smaller than itself it will be a puppy and it will get used to the other dogs
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getting on well with other dogs has everything to do with the dogs that they are getting on with and the way they were raised prior to you buying them.
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1) There is no such thing as a teacup poodle. (Or teacup of ANY breed.) They are poorly bred dogs that unethical breeders make to sell to ignorant people. Poodles come in 3 sizes: toy, miniature, and standard.

2) There are entire books written about specific dog breeds. There's no way we can tell you "everything".

3) If they get along depends on the individual dogs.
.
References :
http://www.akc.org/breeds/poodle/
http://www.poodleclubofamerica.org/
http://www.amazon.com/s/ref=sr_nr_i_0?ie=UTF8&rs=&keywords=toy%20poodle&rh=i%3Aaps%2Ck%3Atoy%20poodle%2Ci%3Astripbooks

Any "teacup" dogs are poorly bred, sickly little runts that are sold for waaaay too much than they're worth, and will cost his or her owner more money in the future because of their poor breeding. Anyone who breeds "teacup" dogs are backyard breeders or puppy mills and should be steered clear of.

Toy Poodles are the better choice.

Toy Poodles are great dogs, but they are not for everybody
Here is information on the breed that will help you decide whether or not this breed is right for you.
hhttp://www.yourpurebredpuppy.com/reviews/toypoodles.html
http://www.akc.org/breeds/poodle/index.cfm
http://www.dogbreedinfo.com/poodles.htm
http://en.wikipedia.org/wiki/Poodle
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