Ok, those of you that followed my thread yesterday, the lady finally has agreed to sell the little 1 y/o 2 lb maybe pg yorkie to me!

Problem....she told me she has some hair loss on her ears and tail; she said not a lot, but its there. She used ivermec (sp) on her 3 - 4 wks ago, but its still there. What is this?? Can my babies catch it?? She has an appt with my vet at 4 this after noon. Advise quick please; I have to call her back.