"They" who? A dog? A cat? Please include this information in your question.
Yes its very possible for the chihuahua to breed your eb. Once she is on heat, she will accept any male dog that's around.
No. Once pregnant, a woman can't get pregnant-er.
Normally cats are pregnant more than 2 times but it is possible.
I would say no because once their pregnant they don't go into heat
Pregnancy is possible once ovulation starts. as soon as you start your menstrual cycle you can get pregnant.
It is possible yes.
Once a female dog goes into heat they are able to get pregnant.
Yes. It only takes one tie.
it is possible for u to get pregnant like that i have been on the pill for 2 years and that happend to me once so i went to the doctor and she said it was very possible
Yes
A dog's heat cycle will last it's course whether the dog is bred or not. It is possible for a dog to be impregnated by more than one dog at the same time, resulting in mix breed puppies. So, no, it will not stop just because the dog is pregnant.
A dog must be in heat to get pregnant. Heat is basically her ovulation cycle.