Recently adopted an adult dog. Little known about her background though friendly enough and adapting well to living in a home. Only been with us a month and doing good during the day but not so much at night. We feed her at 6am, 12, and 4pm, last meal being a lighter one. She sleeps well from approx 9pm when we go to bed, to approx 5.30am. We're early risers so this is OK. Though clearly not sleeping constantly as often times does a wee and poo during the night. She doesn't whine to let us know she needs to toilet. What can we do to manage this better?