Day 227: Another sick bird!

I am now really worried. I saw another sick blue tit in our feeding area. First it was just sitting and watching to nowhere. Then suddenly it started to peck the plastic wall - I think it tried to get nuts shown there. After a while it stopped, picked up some grain and flied away. We definitely need to disinfect containers again and sweep all dropped grains and nuts under the containers. I really don't want all the birds to get sick!