Hi Cara! Very scary when they scream - I am sure you will hear from others, but what your ferret experienced is a seizure caused by lack of sugar in the brain. (or at least how it's been described to me). Here's the link to FACT's insulinoma article on our website. http://www.ferret-fact.org/Insulino.htm We have never nor have we ever been recommended to use ferretone - the issue is that the ferret needs digestible sugar as provided by protein and the best way to get them that is via their usual high protein food. Older ferrets usually do not eat properly. Bad teeth, mild senility, whatever - not unlike elderly humans, they just don't eat properly. So we have found that in addition to medication (be it prednisone or azium drops; or in more severe cases, proglycm) the key to keeping level blood sugar (as in diabetics) is small, frequent meals. As dry food is usually harder to have senior ferrets eat in adequate quantities, duck soup or "gruel" is the treatment of choice. "Lucky Duck soup" is great for the elderly... but dependent upon the recipie can be a PAIN to put together. Better to put your efforts into attempting to feed frequently. I shoot for every 4 hours --- but realistically with folks who work, that is not always possible. Just do the best you can. As for "gruel" we just take ferrets regular food; grind it in a coffee grinder; (we do a whole coffee can at a time); add water and microwave to a cream soup consistency. (The shelter does a fresh batch daily - for 1 to a couple of ferrets, you can pre-make and keep refrigerated for 2 to 3 days and reheat {addiong water} as needed). Don't underestimate the amount of water to add! It's about a 1 part food to 3 parts water ratio -- depending upon the food. Serve about 2 ounces at a time at baby formula (warm, not hot) temp. Each ferret can be rather picky as to consistency and termperature (they are ferrets, after all!). Most ferrets love it. Some refuse it. For the later, you may need to sweeten a bit to get them to take it (then kill off the sugar!) or add some ferretone for your ferret to at least try it. I have younger ferrets that will stomp anyone in their path to reach the bowl. :) It is horrid for their teeth, as it is soft,. watery food....but it is far better than the alternative.. I am sure you will receive other good information here. But the above is how FACT (and I) work with out insulinoma ferrets. Best wishes Ann Gruden Ferret Assn of CT, Inc. [Posted in FML issue 5183]