My Artemis is eleven and she had this neck injury inn the past that messed up her brain. It messes with the brain signals that go do the different parts of her body, so sometimes her paws or legs just sorta don't work well. She's real clumsy and loses her balance alot, and she falls down often when she squats to "use the bathroom" so to speak. She usually can't climb the stairs anymore so Dad has to carry her (she's ordinaraly like 75 pounds!), and she can't stand up at all on the tile floor in the kitchen or the linoleum in the bathroom. She's also lost like five pounds in just the past few days. Dad says she's been doing nothing but following him around like a shadow lately too.
Well she's gotten worse in the last few weeks, and even worse still in the past few days. Dad took her to the vet today, and they put her on some meds. If anything can be done, then the meds are it, and if they do do something, then we'll see a difference in her behavior in a few days. But if we don't see an improvement, then we're gunna have to put her down pretty soon, like within days or weeks.
My brother is getting a puppy of his own on the 15th, and he wanted the dogs to meet, but we're not really sure if Artemis is gunna make it that long.
I went over to Dad's today to spend some time with her, and she's just spent the whole time laying next to me. It's kinda sad. She's a Weimaraner, which are like the ADHD of the dog world, because they're SO high energy like ALL the friggin time! I mean, she loves her naps and all, but she's usually so all over the place and getting up from her naps to investigate every single little noise and stuff. Today, not so much.
I don't think she's in any pain though. She yelps when she is, and she hasn't really been making much of anything as far as noises goes...'cept for a bark or two when the wind blew the door open and when our brother came to visit earlier.
So anyways, I know this is like super long, and I don't really expect you all to sit and read the entire thing all the way through, but it kinda helps to just share. So thanks for listening
Poor baby. I hope the meds work. My dog is very old too, I constantly dread being in a situation like yours... I just wish they could stay young our whole lives. 
