Hi pal .How long have you had those? how many days?
If you could give us an idea how you are keeping them and at what temperature i'm sure some experienced kind people on this forum can help advise you.Foster Reeves being one of the more expeienced keepers,as for their health that's a gamble you take buying them blindly.If i was you i would avoid handling them for a while and keep them cool. I would put them in a basic setup just now and avoid disturbing them.The dark Tylo's/echino=whatever'sseem to be very prone to stress .
If you put them in a setup with damp paper towel/tissue and with a couple of cork bark or hide's of some sort.Then offer some lesserwaxmoth larvae or earthworms,leave them to their own devices for a couple of days and allow them to aclimatise.After a couple of days you can check to see if they have eaten or deficated,and check them for other sign's of ill health otherwise leave them alone.
As for breeding them ..."You have to crawl before you can walk!"
Good luck with them above all!!