What is this knot on chicks beak

[azygous]

Living where you do, mosquitoes will continue to torture your flock. I highly recommend vaccinating them all to prevent these painful outbreaks. https://www.valleyvet.com/ct_detail.html?pgguid=63C9BFF7-0AE9-41A5-BCE7-773D195EE78C It's given on the inside of the wing. Do-it-yourself. Very easy. Very inexpensive.

 

[jus10inla]

Living where you do, mosquitoes will continue to torture your flock. I highly recommend vaccinating them all to prevent these painful outbreaks. https://www.valleyvet.com/ct_detail.html?pgguid=63C9BFF7-0AE9-41A5-BCE7-773D195EE78C It's given on the inside of the wing. Do-it-yourself. Very easy. Very inexpensive.

So this can only be given to the biddys & few pullets not laying yet?

 

[Eggcessive]

The vaccine is given to chicks at least 8 weeks old. Do not give it to one that has it. Scabs when fallen off, are still contagious, and can become powdery and inhaled. Here are the instructions:
https://valleyvet.cvpservice.com/product/view/1506010