The first few weeks of dog pregnancy you will probably see decreased appetite, a sudden decrease in activity, nipple growth
, and behavioral changes. She may be far more affectionate than her regular behavior
or just want to be left alone, it.
The tissue and glands underneath her nipples will swell to make room for her baby's milk. in the next 3-4 weeks.
After the first few weeks her appetite will reappear and she will rapidly start gaining weight. Her abdomen will thicken and be firm to the touch. Smaller breeds look larger when pregnant than bigger breeds because they have less room to carry all of their puppies. You will be able to feel the puppy movement during the last week of her pregnancy because that is when the babies are getting into position for birth
. Don't be surprised to see several drops of milk leaking from her nipples prior to the labor.
Typically the pregnancy will last 60-64 days.
If you want her to be checked, it can be done by ultrasound after several weeks. the fetal bones
are visible on xray at 45 days, which is far less expensive usually.
I am a bit concerned due to her young age- small litters, early births, congenital malformations etc.. Any breed can have problems giving birth- chihuahuas are a breed that have a higher incidence because of the size of their heads. It will be very good to know how many she has for sure (xray late in pregnancy most accurate) so you don't have to worry in the night whether she is done.
You should, if she is pregnant, get a good book, or talk to your vet about how dog birthing should progress, and the signs of trouble- it is much to vast a topic to cover here.
Hope that helps!!!