Thanks so much Butterflylover for your suggestions. Sometimes it is so frustating. You try to do the very best that you can: bring them inside, keep their food fresh, keep their cage clean, and a lousy tiny fly still makes it in. I saw the blasted fly pellet catapalt out yesterday a.m. on my way to work.
I had had this problem with the crysalis, but wasn't for sure that it would happen with cats. Someone mentioned that it could happen to eggs, also.
I will check out the sites that you recommended. I have the book, "Milkweed, Monarchs, and More." It has been very helpful. Who would have thought that there are so many bugs, and parasites attracted to MW?
Congratulations upon your raising 77 cats. That is amazing! This is my first year, and I raised, tagged, and released 40. I now have 12 more 3-5th instar cats, that I hope to release before the weather gets bad. I've had the time of my life this summer. And a wonderful show of Monarchs migrating thru.
We are very fortunate to have these great forums.
What kinds of MW do you raise your cats on? I had better luck with swamp mw not wilting as bad as the tropical. But the yellow aphids really love it also.
Thanks, again for your help.