I am sending up prayers for you and your family. This is all so hard to go through and there is so much info to take in.
The Hepato support and Vetri DMG can be ordered online if you decide to go that route instead of the denamarin i think that TLC gave a link in prev post. This is what I use too and it is really easy to give.
I also had a really hard time getting Copper to eat at first, I did find that if I sprinkled just a tiny bit parmesean cheese on top of the LD that it helped perk his appetite. I still try and have him eat frequent small meals, this makes a big difference in how he feels thoughout the day.
I am so sorry that she is sick with LS. Praying that she does well tonight so that tomarrow you can bring her home.