Do you know what size dog you will be getting?
The smaller the dog, the cheaper your monthly feeding
bill will be.

Food:
Our 2 Large dogs go through approx. 40 pounds of good
quality kibble dog food every 3-4 weeks.
Cost $ 27.00 for a 40 pound bag.

Can food/or people food that I add to their food,
approx. $2-3 dollars per day for both dogs.

Vet bills: I would say on the average about $200-300 per dog
a year. Sometimes less and sometimes a lot more depending
on accidents or illness.

Shelter:
Dog house, bedding, fencing if needed.

Accesories: toys, leashes, collars, brushes, combs,shampoo,
toe nail clippers etc. etc.

Flea/tick products:

Depends on size of dog.
For Front line I pay $36.00 for a 3 month supply
that accutally lasts me 6 months.

Dog licence fees:

I am sure their is more, but I drew a blank.