I tried some arborvitae plant food spikes and a little extra watering. That helped mine. But now I have a new problem. There's a "porthole" on one of my bushes that the neighbor's kids made by breaking off branches so they could "see me better" when I was working in the yard one day and my back was turned. Is there any way to encourage new growth in the area? The hole is about halfway up about face height.