Re: HELP: Dogs mating properly, yet no puppies despite SEVERAL attempts!
I have just started with dogs and have two. I just began noticing that the female is having a bunch of hearts spontaneously and frequently. Is your female in heat? If so, have you matched your mating times with the heat cycle?
Update on that one... Since I was wondering if that was what was going on I just had my Sim tell the male once 'encourage to mate with...' and they did the noses and hearts thing you mentioned and ran off to play... and a couple of minutes later I have a notice that she is expecting puppies. Oh, man, and they have a new toddler... 😉
So... maybe try to watch for her showing signs of 'heat', which is imperative for the process to work with dogs in real life, and still far from a guarantee.
By the way... if you're interested in the puppy experience and like Yorkies, I just saved and uploaded a copy of my household with the pregnant Yorkie under the name 'Chef with Pregnant Yorkie'.