| alexa, I'd probably try to keep it as simple as possible. For your older dogs, either MSM or Gluc/Chond (but not all three including the yucca), at least to start.
As for the younger dogs, if it's not broken, don't fix it. Should they show any signs of lameness, then you have the option of adding a joint supplement.
You're feeding quite good foods so I'd leave it at that for the moment and just watch how they do on the new food. One thing that will help considerably are probiotics - they will work to assimilate the food in a much better way. And perhaps a bit of raw foods now and then (one or two meals a week) as well as a good supply of bones.
Barbara |