They all look fine to me, but why feed such nice succulents. ? You could pinch off a piece now & then to encourage branching out and feed a pad or two. Succulents in general are fine. Our local asian store stocks large pieces of aloe & opuntia cactus pads & fruit.
I'm growing more succulents. I did try to get the cactus pads twice. They were always rotten and smelly. I get the cactus chips from Kapidolo farms. Thank you