I think the idea of buying 2 more shrubs for birds is really nice, But before this I would like to suggest you to beware of all the caterpillars and all viburnum leaf beetle damaging to your shrubs. A few days ago I was also planning for buying Arrowood shrub and I had it, but just after rainy season The shrubs seems to have suspected with the beetle. Then one of my neighbour suggested me to contact to Professional Pest Exterminator like Pest Exterminator in Sacramento to get Rid of these beetles on the shrub.