Ricky, I'm answering your question from the other raw feeding thread so not to hijack that one.
I'm confused! The Darwin website says to figure about $2.50 per day. How do you do it for $.85 per day?
Here is the calculation for Rory at 7 lbs.
Weight 7 lbs. = 112 ounces (7 x 16)
Daily recommended feeding is 3% of body weight or 3.36 ounces. (112 x .03)
3.36 ounces divided by two feedings = 1.68 ounces in the morning, 1.68 ounces in the evening.
Price per lb. of $3.50. Each Zoologics (human-grade meats and vegetables) kind ; beef, chicken, duck, turkey are priced differently, from $2.95-$4.10 lb., but they average $3.50 on my order.
$3.50 per lb. = 22¢ per ounce (3.50/16)
1.68 ounces per feeding = 37¢ each feeding, or 74¢ per day.
74¢ per day x 7 days = $5.18 per week
74¢ per day x 30.4 days per month = $22.50 per month.
Rory is now 7.5 lbs. so is fed slightly more.
If you are 13 lbs. based on feeding 3% of body weight your costs would look like this:
6.24 ounces per day / $1.37 per day
3.12 ounces per meal / 69¢ per meal
$9.59 per week / $41.65 per month
As an exercise I compared that cost to feeding Canidae Grain Free, a well-regarded dry food available at Petco and elsewhere.
The 24 lb. bag costs $59.99 and contains 384 ounces (or 48 cups) of kibble. The recommended amount for a 13 lb. dog is one 8-ounce cup.
$59.99 divided by 48 cups is $1.25 per cup.
Canidae kibble cost per day $1.25 / cost per meal 63¢
$8.75 per week / $38.00 per month
Difference for 13 lb. dog is about $3 per month.