What is causing my dog's scabs and hair loss?

I have a 6-year-old spayed Border Collie/Jack Russell mix with really bad skin problems. I am lucky enough to work for a veterinarian, but no one seems to be able to diagnose the underlying problem. She very often used to break out with redness and bumps, especially around her vagina, but they subside after 2 weeks of Cephalexin. Now she is constantly getting scabs that almost look like ringworm or hot spots, but no one seems to think that's what it is. It starts off red and wet, and is followed by hair loss and very dark, almost black scabs. When the scabs dry up and fall off, they take more hair with them. They are mostly on her back and under the base of her tail, but they have appeared around the scruff and on her neck. She doesn't scratch or bite them. She only eats Wellness brand dry and wet food and distilled water. She hasn't been exposed to anything different that would trigger a new allergy or anything. She does not have fleas. Does anyone have ANY idea what this could be?

What is causing my dog's scabs and hair loss?
I work in a grooming salon as a new groomer. My sister also is a groomer there, now for over a year, her standard poodle (now 11 months) was on Cephalexin for a month and there was no change in her skin. She has bad allergies and was always chewing on her skin which would then result in hair loss.





My sister and our boss purchased a product in Hershey, PA at the Grooming Expo and it has changed all our our dogs health for the better. Below is the link:





http://www.okdirectpets.com/servlet/prod...





Working for a vet, you've probably heard of the Norwegian Kelp. The poodle has stopped chewing and itching and her hair is now growing back (just in time for this years competitions!) and we are all sold, as we all use it now.





Also, my boss has an adult standard poodle (9 yrs) that has had allergies all his life and been on and off Cephalexin shots most of it. Since he's been on the kelp he has completely stopped taking the shots!





You need to know that it will most likely take two months before you could see a change, but be patient, we are firm believers of this stuff and sell it in the shop.





It helps reduce stress, dry skin and allergies, reduces shedding and improves condition of coat, reduces pain from arthritis, restores pigmentation, balances thyroid, aids digestion and great tasting.





I know your dog has different symtoms but sounds like allergies and it wouldn't hurt to try anything after the poor thing has suffered this much. Hope this helps out some!
Reply:Is your dog spend its time mostly indoor? Did you use any floor detergent when mopping floor? Sometimes it might be due to detergent causing skin irritation





Or what about your dog shampoo? How often do you shampoo your dog and with what brand and range? The shampoo might not suit your dog,





Food, even you are feeding the best quality brand, it doesn't mean it will not cause allergies. Your dog might be allergic to one of the ingredients.





What about your dog snacks and do your family members/neighbours/friends/whoever feed anything without your knowledge?





Or it might be allergic to something in the environment.





Do a skin test if you must.





Try the apple cider vinegar method to help with the skin problem





http://www.earthclinic.com/Pets/acvfordo...