This morning, I took a plastic chair up to Pie's paddock and put it in the shade of his shed. I sat there for a long while, reading a book, while he ate his hay - he did stop for a moment and come over to investigate what I was doing but went right back to the important business of eating. It was very pleasant just to sit there with him, and later in the afternoon, he got his grooming which he seemed to enjoy.
Today was a day of ups and downs. I overdid the exercise a bit yesterday, so today I took it easy and mostly rested - when I overdo I get a bit of a headache and also get very tired - I'm sure these are aftereffects of the concussion. By the end of the day I felt much better. But I was able to go without my arm sling for almost the whole day with very little problem - the arm won't move without pain in certain directions but is otherwise pretty usable, and the ribs are giving me little trouble at this point, so I was able to drive the car and do some errands.
So daily ups and downs, but every day is a bit better.