calculation for cost per day of dog feed
1 Cost varies widely based on the size, age and activity level of the dog. 2  An elderly, sedentary toy breed dog might be able to eat for less than $100 per year, while it could easily cost more than $1,000 to feed a young, very active giant breed dog. An elderly, sedentary toy breed dog might be able to eat for less than $100 per year, while it could easily cost more than $1,000 to feed a young, very active giant breed dog. 2  The price per day for any given brand is most expensive with the purchase of small bags and least expensive with large bags.