Hi I have a frin that has a dog and a cat that have a scabby rash on them the dog is losing his hair. She also has a kitten and another dog, but these 2 dont have it. i belive that it is a mixture of flea shampoo flea spray and rid, that she gave them a bath in 2 months ago but the other 2 didnt get the bath is there anything i could do to help them heal.PLZ HELP.