The haven arrived quickly and looked as if it would be perfect. The bars are close together and at first the squirrels were perplexed. But not for long. Either I have hugely intelligent squirrels or there is a design fault. In less than 3 weeks they have gnawed the plastic off the frame and they have worked out how to lift the frame to get inside and pull out the seed tray. The first time it happened I was convinced I had left the tray out after filling but the second time I know it was the squirrels. This was an expensive item and was a total waste of money.