Okay, Per- lay it on me... I want to know more about FCK. I think one of my babies has it- but he's 4 weeks old and had no issues growing (he is the biggest of the babies) and is thriving. BUT his ribcage feels a bit off in my hands (wider then normal?) and I noticed a small dip in his spine behind his shoulder blades this past week. This is a third time repeat breeding of the same stud x queen- never had this issue before. Looking it up online, there isn't too much information that isn't just regurgitated- same ol, same ol- so I thought I'd pick the vet's mind!