Matteo's finger nails peel, they grow up ward and he has no half moon. They have always been this way. His toe nails are like nubs, they've NEVER really grown, but now it's become thick in certain areas and sorta sharp, although it's never grown out in length, like I've never even once trimmed his toe nails and he's 18 months old. What the heck is wrong with him?!! Should I be concerned??

What's a half moon? Zoe has very square fingernails, sharp at the edges. Her toenails grow all ragged in shape. Her nails grow a lot, though, I'm at them all the time. Unfortunately, she takes after her father nail-wise. I've always thought his nails were weird looking, especially on his enormous feet. Does anyone in your family have nails like Matteo's? The only other thing I can think of, which I'm sure you've checked, is that anemia can cause brittle nails. Good luck figuring it out!