[Discussion] BREEDERS: what do you test for and what do you not?

DNA, ortho, optho anything! Wondering what you test for, or not, and why.

Update 2/22 Great answers so far, thanks everyone!

I should have added to put your breeds, lots of variety. I work at a vet and am uninformed about all the different tests available and what is commonly done or not. My own pup has CNM but was not from a breeder.