I saw a smallish monarch cat on my milkweed, with a young stink bug at its tail. I just thought they were coincidentally close.

Later I looked again, the the stink bug looked attach. I went to "rescue" the cat and both of them seemed to move quickly together. Then I realized that the cat was dead (and the stink bug was probably pushing it to get away from me). Are stink bugs predators of these cats, or maybe it was just lunching on an already-dead cat? Also.......it got into the 40's the night before. Is this temp too hard on the smaller cats?

Thanks.