I am new to this list and new to rearing monarchs. I happened on a bunch (> 30 larva) while in a nursery. Brought home the five plants about 3 weeks ago and now have over 20 caterpillars roaming around in various places in my home (butterfly houses, shoe boxes, walls, fireplace ledge....Anyway, I have noticed that several of them are eating the stalks of the milkweed rather than the leaves (I put fresh leaves in several times a day). These are fairly large caterpillars --I think at the fifth instar (but if not definitely at the fourth). Is this normal or need I be concerned?
Thanks for any info.
Peace, Love and Many Butterflies!