You should not buy it at the same time as your sister. Because if you do your sister's chihuahua will fight with yours. And you need to wait for your sister to buy it first because when you look at your sister's chihuahua you can decide which chihuahua is prettier
you should train your Chihuahua as early as you can
They are the same breed yes, but the 'Teacup' Chihuahua is a term to describe the smaller ones. I dont think it is an actual different breed, it is just ever-so-slightly smaller. Alot of the time this is just the 'runt'
2000000years old is how old my chihuahuas breed
No. They are the same as any brother or sister but they are born at the same time.
Possibly, but it should be a boy's bikini so he doesn't look out of place.
Just the same amount, unless you unlucky. All varies It just depends how many the mum can have at the time
Triplets (they have a sister!)
Its not hard at all. When in heat they should be able to get pregnant. Sometimes on their first time they don't get pregnant. But that's rare.
because you have to have two different computers. and be on at the same time.
coformation(or sister) theory
If you go back far enough, all dogs are descended from the same canine ancestors. The development of breeds is a much more recent development in a time line.
it all depends on the chihuahua's disposition. She might become lazy or extremely playful. Many chihuahua's may come into heat around this time too.