I noticed that some HH cages have the platforms removed Pete has never even tried to explore another level they do at least provide cover for him but he is getting quite brave now so maybe they are surplus to requirement. Pete likes to literally explore all of his domain but does not like it if anything is blocking his chosen route which makes space to put enrichment items in rather difficult especially now that I've ordered a sandbox he loves his tubes best and holey log 2nd best prefers to drink out of his dish and although I do scatter some food he still likes to regularly check his food bowl. His substrate is deep 2 thirds at one end and on 2 sides going round the back of his house he tunnels quite successfully I leave the food and toilet area quite low. Based on that information can items safely be placed on top of the substrate i:e sandbox and tubes it's almost to the top of the base do I leave the plastic shelves in do dwarfies ever bother going up I'd like to make it more interesting for him as in a bridge and steps but can't compromise his space. Ideally I would have preferred a bigger cage but had to give away a bookcase to fit the 80 x50.