Far harder than a human before humans can move at least. Chasing around an energetic animal, cleaning up piss and shit off the floor, and taking it for late night/early morning walks are all things I could do without. When humans are old enough to move I'm sure that poses new challenges but until then it's fucking effortless by comparison. Of course, not all humans are created equal. Some can be nightmares too. But the weekend with the dog was the least enjoyable thing I've ever done in my life. And I've done a lot of unenjoyable shit. Mrs. Preston wanted a dog before that and the weekend changed her mind. So it was worth the pain.
And I recognize that a lot of it had to do with me resenting the dog because I severely dislike them and find them gross, but still.. They're not easy.