One thing to note that's very important. My neighbor was having problems with rats and I'm not saying that I've never lost a rat from my colony, but don't ever remember losing a rat, but she was having a problem wit rats. .. I have three cats and multiple rat and mouse traps everywhere in my she'd where the rat racks are.

She had the pest people come and they did everything they could to kill rats. Is there any way they could have come back to my rat racks where the food is on top of my wire mesh to eat and spread something.

They all seemed to start song at the same time, same thing skinny weak and then dead. Never happened before. I may have had some die because of Florida heat but never got skinny.