I took my dog to the vets hoping to confirm that she was pregnant but he said he couldn't feel any pups and that she was having a false pregnancy, we were disappointed, her nipples continued to stay large and her rib cage widened ...can this happen during a false pregnancy , Ive heard that their bellys can get swollen but not their rib cage? Last week her rib cage went back to normal and her belly got bigger she would now be day 61 if she were pregnant are these normal false pregnancy signs?
Just recently one of my friends got a new pup and her older dog started showing signs of pregnancy right after. I'm not sure if she took her to the vet because of this or not but I think maybe she was changing to the environment, as if she was preparing to mother the pup herself. I'm not sure and I hope someone knows the answer to this question so I too can pass it on. good luck :)
How did your vet check? If he palpated they could be wrong, I had a vet tell me a dog wasn't pregnant by palpation and she had three. If it was ultrasound or an xray after day 55 they were probably correct. Has her belly gotten quite a bit bigger or just a little bit?
You can go in for another xray or ultrasound, if you don't do that I would treat her like she's pregnant just in case until about a week after she would be due.