re: OT Homeowners with wood floors: Anyone have a solution for this?

I have same floors - I used several wood fillers over the years but they just dry up and crack and come out again.

So, I bought some black caulk and used that to fill the huge areas, then just left the smaller areas alone. The caulk will expand and shrink with the wood and not crack.

Other than refinishing the floors and using the sawdust/sanded dust to fill the cracks, the caulk is the only solution I have found. That, and an area rug - LOL