Years ago when I was acquiring monitors, I got some from Fla. importer/dealers. They often warned me, that these monitors would have very messing stinky decharges. They said, don't worry, the monitors are not sick, its just the cat food we feed them.
That is absolutely a true story. But as usual theres more to it. You mentioned having your monitor treated for parasites. You know what, you have it backwards, if you took proper care of your monitor, Whole prey/food items, and other normal husbandry methods, you would not have to treat your monitor for parasites.
Consider, I have been heavy into keeping monitors almost 15 yrs now. I have had two treated for parasites(when I was new and did not know better) I have never lost or had problems with monitors having parasites. Then consider, I have lost monitors to many other things, like me being an idiot and doing dumb things. But for some silly reason, folks think parasites are a problem. Do you understand, you are covered inside and out with parasites?????????? Whats the problem? its normal. As I often say, in nature, they reinfest themselves with parasites with every meal. Yet wild monitors are doing far better then captives. And we can supply all their needs so very easily.
You know in nature, parasites are there to insure the strong survive, that is, they will indeed help the demise of weak individuals(old/sick/injured). Which leads me to think this, how come our captives have a problem? are they weak/old/sick/injured????????? if so why?
Cat food is one reason why. Get rid of it. Don't get me wrong, a diet of whole food items can withstand an occasional feeding of such goofy things as turkey and catfood and dogfood and other such human things. I really do not understand why someone would think of feeding monitors such things. Ok, I forgot, we are human. FR