S
Some chi's get really it with only one so that is not the best way to judge. I get xrays done on all mine. So for that way has been bang on. I like knowing exactly how many I have. I had a in home vet tell me once that there were no more pups in my one pomeranian and thankfully I knew from the xrays that there were three. I told the vet she didnt know what she was talking about (and she didnt) and took her into another vet who had to do a c-section to deliver the last pup.