vivarium or cage

by Georgia Hilling
(pontefract)

Hello

please can you help me?
I have two five year old hurman tortoises that live together in one 6ft vivarium with all the correct lights needed and heat lamp (as advised by the pet shop when i got them as babies)
they seem to be happy in the tank, but lately many more sites and blogs on the net are suggesting it's wrong and i should keep them in a open top box?
i also have a very small baby hurman that lives in a smaller vivarium on his own but have to say, he seems really quiet and only comes out to eat!
should all my tortoises have a different open top home.
I want whats best for them.
to be honest the baby doesnt seem as happy as the older two.
just to add, i do get them out in the garden as much as possible.