Re: Stop then Start feeding
Yes, you can absolutely restart breastfeeding! You need to do three things, all at the same time: 1) rebuild your milk supply, 2) get baby back to the breast, and 3) gradually reduce the amount of formula you are using. Depending on your baby's willingness to nurse, #2 may be the most difficult part of the equation. It's very worth trying, since a nursing baby stimulates supply very effectively, provided baby is willing to work for the milk. If your baby won't nurse, you may be stuck pumping- but breastmilk in a bottle still has huge health benefits to baby, and producing it has huge health benefits for you, so it's worth doing.
These links talk about increasing supply while pumpng: http://www.kellymom.com/bf/pumping/p..._decrease.html and http://www.kellymom.com/bf/supply/ma...pply-pump.html. It is particularly important to use a good pump. A low-end pump will not get good results. I suggest renting a hospital-grade pump.
This link talks about getting a baby back to the breast: http://kellymom.com/momblog/bf/ages/...ack-to-breast/. In particular, the instant reward and skin-to-skin techniques are said to be helpful.
This link explains how to wean from formula supplements, once a baby is back on the breast: http://www.kellymom.com/bf/supply/decrease-formula.html
You don't say if you're considering stopping and then restarting, or if you've already stopped. If you're thinking of stopping temporarily, I encourage you to do everything you can do to not stop nursing. It's always easier to maintain a nursing relationship than to try to rebuild one.
If you've already stopped, can you share why you stopped? We may be able to help you avoid whatever problem it was that caused you to quit.
Coolest thing my big girl said recently: "How can you tell the world is moving when you are standing on it?"
Coolest thing my little girl sang recently: "I love dat one-two pupples!"