My vet has recommended I give my dog something called Sami as an antioxidant also for liver health. Has anyone heard of this? I can't find it anywhere. It is supposed to be a suppliment for humans, I think.
The supplement your vet is referring to is SAMe. It is a liver support supplement which can be bought in many places. I don't live in the US but I'm sure people on the liver groups have mentioned that it is available in Walmart or Costco. It is also available from your vet in the form of Denosyl.
You would be advised to join a liver group for help, information and support.