Wow! Thanks for all the great responses. Sorry I babbled, and didn't give specifics on my first post.
She is 8, probably almost 9 years old now. Back in about May of this year she started losing a lot of weight, and pretty much stopped eating, and starting peeing in the house, drinking a lot and peeing constantly. It wasn't a UTI as we had originally suspected, though she was treated for one just in case. She was also put on SAMe, and she is now on S-Adenosyl which also has milk thistle, and is a whole lot cheaper from Amazon.
Although she lost a lot of weight originally, the vet wasn't worried 'cause of her size and the desire to keep them thin. So, in other words, they were telling us she was fat. She's about 80 pounds now, is back to eating regularly and normally, and has pretty much all of her energy back. That's why I was a little frustrated that her numbers were still high, though I guess I shouldn't have expected any miracle cure, since they could never tell us what was causing the numbers to be elevated.
I think I remember them doing the copper test, but I don't remember for sure. I'd have to ask. They also did a needle biopsy on her galbladder (??) if memory serves. That seemed to be the last fairly non-invasive thing they could come up with. They were looking for an infection, which could cause the liver problems. They didn't find anything.
I did ask about diet a while back. Trinity is VERY sensitive to diet changes, and in the vet's opinion, since she seemed to be feeling OK, best not to mess with the diet, since it could wind up causing more problems. She does seem to have one "issue" that I think is related. She seems to get a little backed up, and as a result, although she goes out several times a day, about once or twice a week, she unloads in the house.Beyond her not waking us up barking to go outside, I don't think she can help it because she's not had this problem before she got sick.
I'll read through all of the other ideas in detail and try them out.
Oh, and YES, it is Tramadol that she prescribed for her, but told us to use it ONLY as needed. She's never shown any hip issues until about a month ago. The problem is, our deck is about 7 steps off the ground. If I let her out the front door instead, she ends up on the deck. Creature of habit. I'll sit there calling her, and she'll be sitting by the back door. Not the sharpest tool on the shed.
She has pretty much learned to stop at the bottom of the steps and carefully climb them instead of coming up like a freight train. She will still try to jump instead of using the steps when she's at another deck that is lower. That's when it really hurts her. I had the same problem with my first Shepherd, but he was a tad smarter, and learned that certain things hurt, so don't do it, and he lived with it just fine.
Crating isn't possible. She tears them to shreds and breaks out. We've thought about getting her a stainless steel, welded frame crate (very expensive), but then I'm afraid she'll break her teeth on it. She put a big gash on her snout the last time she took apart a metal crate. Fortunately she's not alone very often, as my wife is home, when not running around with the kids.