Successful breeding of Pets?

I am having an issue with my dogs having puppies. I can get them to mate fine, and receive the notifications fine, but once I get the notification of my dog going into labor, nothing happens. She just walks around panting all of the time, never sleeps, and is always uncomfortable. I waited a week (sims time) for puppies to arrive after going into labor, and still nothing. When I tried to breed her again, the option is grayed out saying she is already pregnant. In my saved game icon, she is all crazy looking. I have tried this with dogs I create in CAS, and stray dogs I adopt in game - same thing happens. I have no mods or cc. I thought bugs were fixed in the last patch in December, but it seems my game has become worse since. PLEASE ADVISE!