Diet, nutrition, and supplements are my favorite subject. LOL!!
I do use supplements. We use Nupro for general vitamins/minerals. Some dogs can be sensitive to the flax in it, but it's a good all around supplement. I use it a couple times a week as maintenance.
I think that next time I will get the joint support Nupro as a preventative against LP. Won't hurt and might help.
I also use salmon oil. Platos or Grizzly is a good brand. Again, just a squirt a few times a week.
I occasionally throw Brody a vitamin.
He likes these Vetri Science chewables ....