This a sore point with me at present. Yes, I did feed the birds and never had any problem with vermin. Squirrels in plenty, whether I fed the birds or not, and collared doves.
I used to have a wide range of birds coming to the bird table but this winter while DH was ill, I rather stopped. I started again a month ago, and narry a bird have I seen. A squirrel trashed the plastic fat ball holder - I thought - then yesterday I saw this jackdaw, huge bird, attacking my new metal fat ball holder and I realised who had trashed its predecessor and what the problem is.
There are 2 pairs of jackdaws nesting in next doors chimney, They are bullies and their diet can include small birds, especially chicks, so the birds are avoiding my bird table because of the proximity of the jackdaws. I had 8 jackdaws in my garden yesterdays, so there are obviously more nesting nearby.
I am not sure what I can do to rid myself of the jackdaws and get all my other birds back. Meanwhile I am not putting feed out.