This is my favorite: https://www.amazon.com/RMS-Rotating-Mobility-Extension-Wheelchair/dp/B00THEDMNW/ref=sr_1_8_a_it?ie=UTF8&qid=1533174898&sr=8-8&keywords=grabber&th=1
They are $15 on Amazon, but they're two for $10 dollars at Costco.
Oh I replied above but thought of something new and am putting it here: get her a grabbing stick, something like this. Bending over can be painful for a while.
Also if she has a cat or two, having the lightweight cat litter is great for not having to lift as much. I ended up buying both the grabbing stick and lightweight litter off Amazon. Also, depending on how nimble and adaptable the cat is, you can move the litter box onto a table so you don't have to bend down to scoop.
A grabber