Need Money for Dog Food for Growing Puppy

Good evening
I have a handsome 8 month old puppy.
He is the love of my entire life.
I didn't know when I got him that he would be already over 70lbs at 8 months old or that he was going to be over 100lbs very shortly.
I've been having a lot of trouble keeping up with his food and I'm starving myself, not purposely, just to try to make sure he eats.
I desperately need some help with funding for dog food. 
I'm really hoping for at least 100$ so I can buy something decent for him in bulk online so I don't have to worry about him being hungry. And so I don't have to ever feel so sick like this again like I do now on day 4 of not eating anything and not a clue when I'll be able to eat again. I am trying to get help from the state and such but not having any luck and I'm getting impatient. I don't have anyone to help me. I would really truly appreciate someone lending a hand.