I've owned teacup to medium sized dogs myself and growing up and have even volunteered my time on and off at the Humane Society in both the cat and dog rooms. Currently have two cats, there's no 'vs' debate. With walking, I will build them up to a cardio jog and wear them out just to make sure they're getting decent exercise and will also play with them a bit so that their energy will hopefully be depleted by the time you get home. In regards to sitting, if left with instructions I will follow them point-blank. Also have experience as a custodian so if there's anything above and beyond you would like me to do as well I would be willing to add them on to the list for a small extra fee.