I live where it gets cold during winter and have a large sulcata that loves cactus, I grow both types, with spines and spine-less, The spine-less types that I grow are more tender than the types with spines so they are what he gets during the winter months. I usually cut the pads off the plants and bring them inside to warm up for a while before feeding them to him. This morning he came out early looking to eat, when I cut the pads and brought them in I checked their temp with the temp gun and it read 20 degrees F. I soaked them in water and they warmed up quickly. So Walker could enjoy his morning snack and go back into his warm house. Anyway this got me thinking about freezing cactus for later use which has been talked about on this forum several times.maybe if you dehydrate the pads some before freezing, like what happens naturally to what I grow starting in the fall it wont turn to mush when thawed out. In the spring all mine re-hydrate and start growing again. I cut this 11 inch pad off before it got cold and it has been sitting in a bucket inside the house along with about 5 other pads and has dried out pretty good. I'm going to put it in a freezer for about a month and see how it does after thawing out. If it doesn't melt I'll plant it to see if it will root.