I have five day old kits that are warm, healthy, and not dehydrated. I have been nursing off the mom with help from us but I have not seen them pee and I tried stimulation with failed attempts. Any suggestions?
All you can do is try and stimulate with a warm wet soft cloth. If they are still in with mom, she might be doing the job of stimulating and cleaning them off already.
If they aren't peeing you will see their bellies starting to get very bloated and they will likely stop eating soon after.