I always, always get so excited that I eat the Goosgogs before they have had time to ripen.
Mine, I have 2 bushes are planted up in an old bath. And, the caterpillars do turn a lovely bright green after eating the leaves. I encouraged to birds to get in to the bushs by raising them up. And, I've changed my view on squishing the caterpillars - if I concentrate I'm sure that I can't hear a 'pop' and smell goosegogs!!