No sadly not, they are nervous little dudes. personally, I wouldn't say it was a good buy, its a lot of bloody money for what I've got from it, the only perk for me is that its a corner cage. They probably have the same floor space though.
It is a NIGHTMARE to build too. Really would not recommend.
It is good as it is but for over Â£100, you would expect more. grrrr
Could it be that the reason they didn't use the other level was because of the ramp? I have the same cage and the ramp that comes with it is very slippy and poorly made, I carpeted mine and soon my boys were running up and down. It's a shame you had to get rid of the level as the 2 tiers make a great lot of space for a pair of boars.
If you've got the space I'd hang on to the bits left over. You might get them up in the top section with ramp help and more confidence, or you might need the extra base as a place to keep a poorly piggy in the future. Just a thought!
They are fab piggies, looking happy and healthy! A credit to their piggy mum!