  FIR observation of BCD galaxies with Herschel has revealed a wealth of new
insights in these objects which are thought to resemble high-redshift forming
galaxies. Dust and cold gas showed to be colder, in more or less quantities
than expected and of uncertain origin. However, not unlike in the local
universe, not all the dust or the cold gas is accounted for, making it more
challenging. SPICA and its factor 10 to 100 in sensitivity will allow to image
the faint extended cold gas/dusty disks in BCDGs in addition to detect faint C
and O lines only marginally or not at all detected by Herschel/
