I have been doing alot of reading and they say if their stomachs are tight that it could be worms..they say that the mom can carry them but she never show signs of having them and they not affect her until she has babies and they are "activated" during pregnacy and she passes them on to the babies. I have pasted what I read about it. It is below.
Pre & Postnatal advice - young stray cat
Q: Hi Dr. Mike! We will be having kittens very soon and we were wondering if you could give us a little pre & postnatal advice for mother & kittens. Here's a little background: We took in a stray kitten just a few months ago, so I'm assuming she hasn't a shots. She is still very young - will she take care of her kittens? We are setting her up with a space in the linen closet for her labor. What indications should we look for when she is birthing? Also, how old should the kittens be when we give them away (we have some good homes already!) When and what should we fed kittens as they get older? Basically, we need the rundown! You're help is greatly appreciated! Great web site! The H. Family
A: I think it is a good idea to change gradually to kitten chow as the mother cat's diet, starting about 3 weeks before she is due.
It would be a good idea to have her dewormed for roundworms as soon as the kittens are born. These are often "activated" by the pregnancy. It would be a good idea to get her vaccinated, too, but I might wait until after the kittens are weaned if she stays inside.
Cats are usually pretty secretive about having their kittens and it is likely she will have them somewhere you didn't expect and that the signs will be kittens in your sock drawer or something like that. Providing a safe secure place like you have is still a good idea, though.
Kittens should be introduced to solid food at about 4 weeks of age (3 weeks is OK if necessary). Using moistened dry cat food works best for us. They should be eating almost entirely solid food by 6 t 7 weeks of age. I think it is best to keep them with their mother until 8 weeks of age but many people let them go to new homes after 6 weeks.
Kittens should be dewormed starting at 6 weeks of age and vaccinated for the first time between 6 and 8 weeks of age.
Hope this helps.
Mike Richards, DVM