I did read somewhere to just give them plain regular yogurt- not Greek. I can't remember why exactly, lol. I give mine just plain organic Stoney Field yogurt and they love it. I also give them Nupro Joint and immunity supplement. I found that after they were running around outside or playing with one another, one of them would always wind up with a little limp- after a few weeks with the Nupro, I haven't seen a limp since, and they really love the taste as well.