Try using Daytum to do it. Daytum is a data-gathering tool that helps you measure anything in your life..or your pet's. (The inventors have since gone to Facebook, where they kind of shook things up.)
For instance, take Charley Lhasa, a NYC pooch. From this gorgeous infographic, you can learn a lot about Charley...the kinds of dogs he meets, the length of his walks, and (very touchingly) the amount of time he's been seizure-free.
Or...GIR, inspired by Charley. Yes, GIR. GIR's focus appears to be on chewing things up (Mum's socks), falling over (occasionally), and smelling stuff. I noticed that GIR's Daytum diary hadn't been updated in a while, and, as the owner of an older (12.5 years, in Datum time) dog, it made me pause for a while. But it looks like GIR's mum joined a startup. Which leaves one a little less time for obsessive dog blogging.
Charley, meanwhile, has a big life beyond data, but since I can't embed his video here, you will just have to find him on his various platforms.
How would you use Daytum? Would it help you manage your dog's health? I would try it, except that it is only mobile on the Apple products, and we are, so far, an Android family. And I'm not sure that I would be disciplined enough to get to my computer to track things. There is still not an app for that.