
Hi,
I would get her checked by the vet, a scan might be a good idea to see if she is in whelp. If it is a small litter it might be advisable to have the vet aware it is a small litter, so that if she has problems whelping he will be ready. I had a bitch who only had one puppy, she needed a ceasarian because only having one puppy inside meant her contractions were not enough to push the puppy out, and the puppy would have died from a long birth process, if I had not had her scanned and the vet on call.