Rabbi my son fried chicken cutlets in a dairy pot which was used last week, what should I do?

Hi rabbi if my chicken sauce got on my fish sushi can I still eat it?

If frozen chicken fell into cold milk is it a problem to drink the milk? It’s definitely batel beshishim. If it’s mutar is there a chumra not to eat it?

What about for a soup that has chicken and vegetables mixed in

What is the beracha on soup that has chicken and vegetables mixed in?