Yes. Just as we take multi vitamins it is not bad to do with our pets pregnant or not. They have daily multi-tabs. Tabs per weight and your good. Keep in mind if she is PREGNANT you defiantly want to get her into a puppy food. (Even though she is not a puppy, yes). The puppy food is higher in fat and protein content which she will need during and 4-6 weeks after to maintain healthy weight ad ability to produce milk for the pups.
Did you know breeding dogs reduces their life spans? If you fix them they have less if a chance of cancer plus you dot have to deal with the sadness if giving the pups up and yes you HAVE to give the pups up -vet