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.
Yes, as long as the chihuahua is "in heat" and they get "hung" (which you will know), the pug can get the chihuahua pregnant.
It's life, when a male mates with a female the female gets pregnant. Remember unless you don't want an unspayed female to get pregnant, keep her away from the male! taking care of an pregnant chihuahua is very hard... And expensive.
No.
I don't see how it concerns the chihuahua
A pregnant cat has a hard belly because the growing kittens inside her uterus cause her abdomen to expand and become firm.
there belly and pups.
63 days
* SPOILER* do not read if you do not want to be spoiled. No, Bella does not become pregnant in the book Twilight. If you read the rest of the books you will find out. But yes, she does eventually become pregnant. Its hard so explain to read on! =]
They have a 90 day gestation period.
This is hard to tell early. The further along she gets, the easier it gets to see that she is pregnant. Her belly will become big and solid.
It all depends on the male dog.
They will not!! A woman cannot get another woman pregnant no matter how hard they try!