It is quite likely that your partner may threaten to hurt your children or your pets as a way of keeping his control over you and making you do what he says. Some violent men will actually try to carry out their threats, so you need to think carefully about your next step and take good advice from people who know.
You may decide that you are all in too much danger and need to get out of the situation. If you can, have an emergency plan for yourself, your children and your pets.