Is the lice treatment working or not??

Hey! So my goats had lice, and around the same time I found it I bought two new babies, that came with lice as well... Whatever, im pretty sure most goats prolly have lice 🤣 and it wasn't a big deal cuz I already had to treat mine.

Mine were starting to get big signs...balding on nose and ears as well as itching. I dosed them twice with an ivermectin pour on. The does have a significant improvement. The hair has grown back and its cool to look at pictures to see the improvement.

One of the doelings I bought began to get hair lose on her nose soon after I brought her home. I treated her twice and it's growing back. She also had a patch on her ear, that was odd because it was a small patch in the middle of her ear, but that seems to be growing back in.

I just got home after being gone for a week and the first thing I noticed was this doeling has a big bald patch on her ears. This was not there when I left. Is this lice still? The hair on her face is growing in so why is she losing hair in a different spot now??

Is this something other than lice maybe?
Here are pictures from the day before I left and a picture from yesterday when I got home.


The picture of her by the red trailer is when I got home, her eating grass is before I left, just so you can see the difference.