I'm reasonably certain that the pet pregnancies are MCCC. I noticed this myself some time ago and talked to MCCC support about it over on Discord. I also found references to some of the pet pregnancies in mc_cmd_center.txt, a log file in the MCCC folder in mods (if you put it in its own folder).
https://answers.ea.com/t5/General-Discussion-Feedback/Pet-population-explosion/m-p/11388232#M60951
Yeah after more testing I was pretty sure it was too. I figured out the aging thing as well, it was just a misunderstanding I had and fixed. I'll look up that MCCC problem thanks.
The basic answer is: there is no toggle to bypass played households for pet pregnancies in MCCC. Spay and neuter your pets! (But through gameplay, not through CAS.fulleditmode, alas.)
Yeah, good tip. My problem had been setting multiple households up before playing them, so if I plan to have pets I have to wait to add them until I go to play them.
