You can do this it is pretty simple. I have been doing it since my Bichon was diagnosed with diabetes. I can watch him whenever I want from work.
I have a web cam connected to my usb on the computer and ran a long usb cable to the kitchen where they are gated off during the day. I use this program
http://www.digi-watcher.com/buy.htm
maryKay
AprilLoves' Mommy