Sukie, The kits born were from a mom who previously had a litter with the same boy a year earlier. All kits were fine, none of them were born with crooked or stained teeth. Mom and the babies were not given any medications. We started the Mazuri food 1 week before she was mated, she was on the Mazuri food during her pregnancy. Nothing was changed except the food. Everything was identifcal to the first pregnancy. When the kits were about 4 weeks of age, we took them to three vets in total, all of them asked what we changed and only thing was the food. They each suggested that we take a closer look at the food and so we did and noticed the ethoxyquin in the food. Studies even back then were on concerns of this preservative causing liver cancer including other health problems and defects. We took them off the food and we did not have a problem with any other litters. This girl had another litter the next year and no problem, no stained or crooked teeth. As I said, maybe a coincidence but too much leads up to the food. Others who used Mazuri who had problems with their breedings and ferrets, changed food and then mysteriously things changed for the better and they didnt have problems with their breedings. Maybe all coincidence but I just wanted to let others know who might be having a problem that Ethoxyquin can be dangerous or cause problems. The link I provided yesterday lists tests done by Veternarians. Please note that Ethoxyquin is rated as a class 3 poison on a scale of 6 by OSHA. A class 6 poison is lethal in a dose as small as 7 drops. Ethoxyquin is used as an insecticide and use to volcanize rubber. I wanted to make sure people were aware of the affects. I only used it for 3 months in total and we stopped. Haven't had any problems like that one litter. Maybe it was a coincidence but it doesn't change the effects that Ethoxyquin can have on the animals. There are several other links such as the below that are interesting to read: http://www.cbc.ca/consumers/market/mp30/ethoxyquin.html http://www.executec.com/nutra.htm http://www.beaktreats.com/articles/food_for_thought.htm http://www.spoiledratten.com/ethoxyquin.html http://www.fila.org/peak/dirtydogscontinued.htm http://www.thedca.org/seizurebasics.html http://www.mobilepetdoc.com/food.htm http://www.petguard.com/main/templates2/article-ethoxyquin.html http://www.judyshealthcafe.com/articles/cancer.html http://www.sniderandhumbert.com/Pets.html [Posted in FML issue 5143]