There have been many questions about how to breed. Well im here to help! Please tell me if your confused! :] To breed,there must be a male and female of the species (dog or cat) on a lot,and a pet house! You cant breed without these things! Here is the list of steps:
Choose a sim and click the pet you want to breed and select TRY FOR PUPPY/KITTEN WITH...and then choose the name of the second pet. There must be a high relationship between the first pet and the sim,as well as between the two pets selected to breed. If the relatioships are high and they are in a good mood,they will go to the pet house to WOOHOO and the female will eventually give birth to a litter.

Then save it! :]

Confused with something? Make a question with the title Julias breeding walkthrough help. Then fill out the following:
1.What confuses you.
2.What do you think you are doing wrong.
3.