I'm pretty sure that housing, cars and food are #1, #2 and #3. Your definition of household spending seems a little unconventional. If pets are household spending, surely so is food for humans?
It was a little inaccurate, you are right:
#2 "after all payments done for yourself/husband"
#1 will be the kids
You can always eat your pets
It was a little inaccurate, you are right:
#2 "after all payments done for yourself/husband"
#1 will be the kids