Re: Sims 4 Cats and Dogs - No mating option.

Were they in heat at the time ?

Haven't really had the time to test this option myself but many seem successful and I know my dog was in heat once (she just didn't like the other dogs)

For the issue with the stray cat, you can post here: https://answers.ea.com/t5/Bug-Reports/OPEN-CD-Kitten-Puppies-not-added-to-household-after-birth/td-p/6408693/jump-to/first-unread-message