Josie ... I am going to be the devil's advocate here. I'm sure this all depends on one's age, life experiences, and personality, but not everyone's idea of the good life is constant activity. What did she do BEFORE she had ALS? I assume she is retired and was so before she became sick. Was she a relentless go-er, always running off to the mall, and lunching with her friends, and making sure she was first in line for the latest movie?
I was pretty active before I got ALS, but my favorite relaxation was still always reading. Still, even that interests me less now, because reading is so difficult ... and because with ALS, so many things that entertained me seem pretty meaningless. After I had a heart attack at age 58 and experienced being debilitated for the first time, I went through a huge depression ... then came to the realization that just being alive is quite enough excitement to keep me entertained. If I had to sit in a rocking chair for the next few years, that was quite OK. You can hear the mockingbirds from a rocking chair, and enjoy a kitty or a dog or a grandchild ... or nothing ... on your lap.
There is a lot to think about when you face death approaching you quicker than you'd like, and ALS is truly ... TRULY ... physically exhausting. Just sitting and being and resting and entertaining yourself with light stuff on TV and enjoying the companionship of a loving pet and going through what psychologists call "the necessary life-review process" is to me a perfectly adequate life style. This life-review process is essential to finding peace in your final days. First you have to make peace with the life you have lived, then you have to make peace with yourself.
You really don't have to be doing all the frantic activities that younger, healthier people fill their lives with to be truly alive. We all process our decline and approaching deaths in our own way. Wearing her out with activities she might not be particularly interested in is, in my mind, counter-productive. Walking her dog may leave her really weak, and require a couple hours to recover from it. If a trip to Starbucks perks her up (no pun intended), by all means invite her. If medications will make her feel better, great, but she shouldn't be taking them to make you feel better.
Right now, she is going through a much more profound emotional and psychological process than you have probably yet faced. If she wants to do it her way, let her. She is much more physically worn down than you may be able to imagine.
The honest answer? She IS wasting away, and she is the one who gets to decide what she enjoys and what she doesn't and what she can manage and what she doesn't want to bother with.
Thus endth my sermon for today (and aren't you glad! :lol