I already have a bird feeder with a dome. The other side has water with a dome. There is no more room to hang anything only for a bowl at the bottom but the food gets wet when it rains so the birds don't eat it. I bought a non toxic pet tray for the birds where I fill up 2 bowls of bird seeds and put it on the tray so the wind cannot blow it. It works. But I need something to put under the tray that is non toxic and safe. I read online that even cardboard boxes are toxic... I thought about putting a rug but I don't know if it's considered safe for animals to eat from a rug since they might end up eating the rug by mistake. I just need something to put under the tray. The way it is right now the birds are crapping all over the cement. I don't want this... I also want to make it easier for me to clean. The wind blows the bird seeds that are on the cement which makes it harder for me to clean. It has to be 1. Safe for birds to walk on 2. Non-toxic 3. Waterproof