My spiders won’t feed, is on its back or hasn’t come out of its hide?

This often indicates that the spider is about to moult. This is quite a stressful time for the spider and it is best left alone. Spider will often stop feeding and block the entrance to their burrows a couple of weeks before moulting. Another reason for spiders not feeding or fasting is that they are not warm enough, try increasing the temperature above room temperature.