I recently bought 1500 ladybugs they quickly eliminated my scale bug/aphid problem. I keep raisins and a wet sponge as a secondary food source. Is there a better food source? Also they have bundled up in a top corner of my tent i assume they are breeding or hibernating? I personally wouldn't consider it a complete success unless I am able to keep them alive for the long term. Any insights or first hand knowledge would be appreciated.