Hey man, you can try the tincture and see if it works but if the vet is telling you it's time to put her down you might seriously start to think about that. It's a very tough decision, one I had to do last year. But the vet finally asked me "can your dog still do the things she liked to do?". And the honest answer was no. She went through two bad seizures and I could see in her eyes she was completely terrified. She was running into the walls and falling down and just fucking awful all around.
I'm not saying its time, but I am saying is that it is going to be time soon. I have scene some
Pretty fucked up cases where people will just refuse to put there pet down. Hell my buddies dog is blind, can barely walk and a month ago..stopped eating. I told him, dude, animals only stop eating for one reason and one reason only. Dude has a dog on an IV.
Anyways, shitty situation and I hope the tincture helps. Sucks to loose a good friend, but think of all the great times you had together.
Peace