SkyeSue - you may find once Chloe gets a bit older she is happier to relax more in the house....
As we do work, Honey is left through the day in the week (with a break at lunchtime) and as a youngster we had to work really hard to make sure she also got enough stimulation and exercise - we built up the walks as she got older, and would do loads of clicker training, searching for treats etc and then, perhaps, by about 9-10pm she would relax. Now if we have an extra day off, she takes herself off to bed!!
She would not turn down additional walks, and could keep going all day if need be, but these last couple of months I have really noticed her calming down a lot.
We still do 2 good walks a day, and clicker training most days, as well as play and some searching etc, but the odd time she has missed a walk, it really hasn't phased her.