Firstly, adding heat sources is more likely to dehydrate puppies. They then move away from the heat, and end up too weak to suckle. 85 degrees is HOT. 72-73 degrees WITH their dam is about right. Their dam will keep them warm, and will not dehydrate them. If you keep it warm in the closet, the dam is likely to suffer heat-exhaustion and dehydration. And we do not want that, these babies need their mamma. If you made it through the first 5 days, your doing great with temperature.
One thing to note though is that the babies will not reach their adult temperatures until about 3 weeks old. This means if they are exposed to common dog illnesses, that a slight fever will kill, they can die from it because they cannot support a fever of 103 or 104 degrees. They are born at 98 degrees and then gain one degree per week. Which means if they are currently at 99 degrees that is normal. If your bitch is at 101-102, it is normal. But keep them away from other dogs. When you take them into the vet for their first shots, don't put them down. Take them in at 5-6 weeks and carry them in a laundry basket and do not put them on the floor. Ask vet techs to clean their hands first. They will be under their mother's immunity, but if she has been as neglected as you say, that she may not have had parvo-distemper vaccines, and she cannot at this point obviously.
Keep your male away from her. Her aggression toward him was momma-bear aggression -- totally hormonal, her instincts are to drive away anything that might hurt her babies or her while she is compromised (giving birth). It is imperative for her and her puppies that she feels safe and has plenty of nourishing food.
Besides high quality kibble, I would give her 4 meals per day with a couple of tablespoons of dannon's regular-fat plain vanilla yogurt (with live cultures in it), or cottage cheese, and a couple of eggs, nuked or fried, meat -- raw or cooked. Left-overs from your dinner, white ice-cream, cheese -- breakkfast food -- eggs, bacon, buttered toast -- she needs to eat and her babies as they grow will be requiring more, not less calcium and nutrients. She has a big job in front of her.
Safety, and nutritious food. Handle the puppies ever day. Keep other dogs away. You are doing great, and thank you for helping this little girl. We don't always get what we want, but if we try sometimes, we just might find, we get what we need. And maybe you are what she needs, and maybe at the end of the day, they will be a great blessing for you.
Heidi Ho, Odie
Joy-Joy, Bear Cub, Hepsi-Pepsi
Cujo2, Karma Chameleon
Ramona the Pest, Kojak -- who loves you baby?
Tiny Tinnie, Susie's Uzzi, Kaiah -- The Baby Monster.