Boomer and Kassie used to be early birds, up at 5 am, saying "come on, we need to go potty". Now it's not so bad, though I'm an morning person so I'm up before they are and they usually are ready to go out at around 7am.
Tilly, on the other hand, is the opposite of Kassie and Boomer. We adopted her when she was 6yrs old. The first months she was here and we were up at 6am to go out to potty, she's lift her head from the bed all drowsy, and I could tell she was thinking "what the heck! you want me to get up now?" lol. She's happy staying in bed till 8am if I'd let her.