From my experience, pelleted litter is EXTREMELY fun to dig in. The only thing that worked was a litter screen from the BB store. It sits directly on top of the litter, so you can use whatever you want and it minimizes rubbing on their feet. Adding a layer of hay on top helps too.

A litter screen would definitely be beneficial in preventing litter digging and eating, in addition to address concerns for sore hocks. As mentioned, the BB store sells screens that you can try! I use plastic knitting mesh as a screen (though you need to cut it right so the edges are accessible for chewing too):

… Also, it could be beneficial to consider redirecting the digging energy elsewhere (i.e., can you make somewhere else more tempting to dig?). I used to tie fleece or kraft wrapping paper to pen/grid walls for my rabbit to pull/dig at: https://www.reddit.com/r/Rabbits/comments/p8bwbb/fleece_digging_corner/

If you try the wood pellets, get the ones for horse bedding.

Wood stove pellets may contain additives.  So, if you end up with those, carefully read the label to be sure it is just wood.

I third that screens are the way to go for digging!

what about getting a  deeper litter box so that when she does dig it doesn’t make such a mess?

For a while I was using a concrete mixing tub (they sell them at hardware stores) as a litter box and it was deep enough that they couldnt push the litter out even when they dug around. Some people also use those covered cat boxes but I always worry about urine smells building up in those.

What kind of screen did you try? I never had problems with the BB screen because it is in direct contact with the litter. The screen doesn’t put pressure on the feet like an elevated grate would. Perhaps the plastic knitting mesh would work better?

It was never a mess. The screen just sat directly on top of the bedding. Pee would go through, but poops stayed on top. I would just flip it over and let the poop fall into the box. I did this every now and then until I was ready to clean the box. You could add a layer of hay on top if you wanted. I didn’t do that, but I never had a problem with their feet rubbing. The hay was in a hay box/feeder next to the litter box instead.