Monarch caterpillars happily munching away

A bit blurry, but this is why I don't pull out all the milkweed that has sprouted up near the side of the house. I counted 4 caterpillars tonight. I just couldn't get a clear shot as it was rather breezy when I was trying to get my photos. When you disturb them they almost look sad as their antennas go droopy. Really!