Egg-zacky. We can all arm chair quarterback the problem 'til the chickens come home to roost, but knowing what is wrong when there are multiple birds involved is another thing entirely. Necropsy by a lab is the only way to know for certain. The great thing about most government funded labs is...
I didn't get a chance to set traps tonight. If the coon, or whatever it is, wants the chicks tonight, it is going to need the key to the garage deadbolt, the passcode to turn off the alarm and security cameras -- and something bigger than my 10 gauge :P
X3
Looks like a good list for US labs:
https://www.heritageacresmarket.com/poultry-necropsy-labs/
and I could only find the Canadian lab in BC:
https://www2.gov.bc.ca/gov/content/industry/agriculture-seafood/animals-and-crops/animal-health/pathology-necropsy
Don't mess around. Test.
I think there was a gap the first two nights. Last night, I can only imagine one of the chicks toes were sticking out of the mesh. I tugged on that all as hard as I could and couldn't get any gap that was greater than 1/4".