
A way to avoid wasting food if you are not quite sure about the amounts is to weigh it out in split portions so you can add or subtract to it if your dogs need a little bit more or a little bit less.
For example - if you normally feed, say, 400g in the morning then you could weigh out 300g in one bag and 100g in another bag. If your dog is maintaining the correct weight with 400g then feed both bags at the same time. If he needs to lose a little weight feed just the 300g and every third day you can feed 3 x l00g bags so nothing is wasted at all. If you find he needs to put on a little bit of weight you could then add a bag and so feed 1 x 300g bag plus 2 x 100g bags. If adding or subtracting 100g food is too much or too little you could use just half a small bag and save the other half in the fridge for the next day.
You would have to work out the best way to split up the portions depending on the amount that you yourself normally feed each day.
With raw feeding the daily balance isn't critical but is usually achieved over a period of around a month - so if less is fed one day a bit more can be fed the next day to make up for it if needed.
If your are trying to take weight off your dog it is recommended that it is done gradually with no more than a 10% reduction in food at a time.
The longer you feed a raw diet to your dogs the more relaxed you become with it but it can be quite daunting to begin with. :)