I usually just have one cat. It is difficult, but I have my one cat that he'll travel with me if it's appropriate, if I'm not going overseas.
The human young must learn to perceive these affordances, in some degree at least, but the young of some animals do not have time to learn the ones that are crucial for survival.
The fact that Eddie Vedder likes to play 3 hour plus shows a night, I have to be ready for that.