She was calm when I got her home, and let me look at her.
I put the new ones in a big cage in the living room, so that they can get their bearings. Covered if they are frightened. She was pretty relaxed. She ate well! After she ate, I examined her.
That's when I discovered the collar...embedded in her armpit. I cut the halter off, and the parts of the collar not stuck to her. I didn't dare pull at the stuck parts, for fear of making the wound worse. There was blood on the halter...
In the morning I found that Chelsea had pulled the rest of the collar off! Shown below. She let me lift her arm. The wound was not nearly as deep and wide as another cat's, (Archie) had been yay, but there was a deep hole; "pocket" in medical terms. Fur was missing on her back ( scab from the halter, too) and around the path the collar had taken.
After our experience with Archie, we knew that this was a very slow-healing wound. I geared up for the long haul, and called the doctor.
When Chelsea was seen the next day, I was amazed at how much the wound had closed up! There was no hole, or pocket left, certainly no infection, and the dime-sized area was "granulated" and light, not dark, pink! WOW!!
It was probably only a few days after she was lost that we saw her...yes, I posted posters, put her on nextrdoor.com, etc. No response. Her halter looked new. In any case, it is extremely fortunate that she was caught as soon as she was! More to come!