I hope you can get some tests done. I truly hope she can take the antibiotic and keep it down. Perhaps give her smaller feedings with baytril evenly mixed into the formula. You may not be able to dose her right at first, but I hope it will have an effect so she will keep her food and doses down in due time. Poor little thing 
Does the abcess on the wing joint feel soft or hard? I ask as it may need to be carefully drained. I may be able to guide you through the process or your vet friend could. I was really hoping that the vet would have been able to prescribe bactrim/septra, or anything really. I also hope you have a good amount of bayril left over, as you will need a miminum of 7 days. A few days worth would do more harm than good if you can not continue without any more antibiotics as a short course would most likely create drug resistance.
It could be a reinfection of the same bacterium she had before. Rarely, a co-infection can occur like John said with other opportunistic bacterium or mycoplasmas that take advantage of a depressed immunity or inflammation. But I hope not. I also suggest garlic water as I mentioned previously in addition to the baytril. It works on many bacterium, even drug resistant strains.
Also, try to keep her very warm and calm. Perhaps a water bottle or a mild source of warmth she can have to snuggle upon if she chooses. She will definately need vitamins (with vitamin B12) and a bit of electrolytes, especially if she still has copius or persistant amounts of watery or loose droppings.
Does the abcess on the wing joint feel soft or hard? I ask as it may need to be carefully drained. I may be able to guide you through the process or your vet friend could. I was really hoping that the vet would have been able to prescribe bactrim/septra, or anything really. I also hope you have a good amount of bayril left over, as you will need a miminum of 7 days. A few days worth would do more harm than good if you can not continue without any more antibiotics as a short course would most likely create drug resistance.
It could be a reinfection of the same bacterium she had before. Rarely, a co-infection can occur like John said with other opportunistic bacterium or mycoplasmas that take advantage of a depressed immunity or inflammation. But I hope not. I also suggest garlic water as I mentioned previously in addition to the baytril. It works on many bacterium, even drug resistant strains.
Also, try to keep her very warm and calm. Perhaps a water bottle or a mild source of warmth she can have to snuggle upon if she chooses. She will definately need vitamins (with vitamin B12) and a bit of electrolytes, especially if she still has copius or persistant amounts of watery or loose droppings.