So the small fine hair spines like on the flower buds should be alright for Opo? When I get one in my finger it's annoying. In fact I have one in my finger right now. Aldabraman is on the same page as you all.My spineless have just a few spines as mentioned previously.
But once your cactus plant or plants reach a very large size, youll be able to just pick and feed the small pads. These have immature soft spines. No harm to your hands at all