I added 51 cats to my caterpillar house today. I placed vases of water covered  in saran wrap (so the cats. don't fall in the water) in the house with common milkweed. 

 I think the cats were happy to move out of the aquarium and into the airy house.

I have about 20 chrysalis so far but they are in the aquarium, They should start hatching in about 8 or 9 days.