We have been told chicken pox, viral rash, heat rash and possibly allergy by the doctors. But the problem is we have introduced nothing new, she had arfid so wouldn’t even touch other food. I have checked for bugs it’s been happening for over a year and we have moved and got new furniture since so that would be out the window. The dogs are treated by vet treatment monthly and no one else has these marks. They go and re appear at least once a month, and some of the old spots have left marks where they were.