Pets and kids just take and take.
Looters! Moochers to the core!
That's why there are none in Ayn Rand's worlds (either her novelistic ones or her real life: she died childless).
And from what I read with noone at her bedside.
There are children in Atlas Shrugged, and a very important passage has to do with a mother and her children in Galt's Gulch.
Hank