Well I have had the egg case inside my house since they were first laid. Today I found about 10 baby mantids on the plant with the egg case. The egg case looks just like it originally did, except now it has 2 very fine threads with about 4 small things that look like they were individual egg shells. Would the entire egg case look drastically different than it originally did once all of the eggs hatch? Or will the egg case look pretty much the same even after all the hundreds of eggs hatch? It is getting cold outside, around the 30s-40s. If they all hatch, (or if they already hatched and got loose inside the house), I don't think they will survive outside at this time. I might just get some fruit flies to feed them until it gets warmer. Will they also eat ants?