I went and moved the piggies this morning and they were happily running around although a bit wet.
This afternoon I took their vegies & water down and Spike was laying on his side and couldn't get up. He was kicking his legs but when I put him upright he would just fall to his side.
Over the next 4 hours he gradually stopped being able to move his head or his legs. I used a hairdryer to dry him off and warm him up (on advice) and then put a hot towel in a box under another towel to keep him warm but he just couldn't last.
I am really surprised at how upset I am for a person who originally didn't want these rats without tails. Little did I know at the time that they are more related to a rabbit than a rat hehehehehe.