We have been breeding rats now for about 6 months we dont have access to a bunch of Mazuri in AK and shipping is expinsive. So to save money we bought Old Roy Dog rounds, all the rats seemed to do great on that but it runs almost .75/ lb so we were like well lets try something else and we tried this other Old Roy (bigger bag and roughly the same price) we use a half Mazuri and half dog food mix. We got this new bag about 3 weeks ago. At that time our rats were healthy, fat, and doing great! Last week when we cleaned our tubs all together we had 98 baby rats and good looking mamas. Today we cleaned again and only 58 of those babies are alive and about 6 of our growing breeders died and 3 of our breeding stock are so skinny it is sick! All of them have the sneezes! I was worried about what was going on not only because it is costing us money but because I am not fond of picking hundreds of dead rats out of the bins! When I read this I went to look at the ingredients of this dog food and guess what??? Red-40 and a few other dyes!
So thank you very much I hope that this is what is causing the problem and it will soon be fixed!