got 4 dats a little over 3 weeks ago.. they only eat live food!! i have had trouble with feeding dats before on previous purchases and they ended up dying on me but with the recent pick up, i quarantined them in a 40g planted with over 50 platys big and small... a week later there were only 4 platys... i moved them into a 50g by themselves and dumped 10 zebra danios in there..those were gone within 2 days... the guy at the lfs told me he starved his for 3 weeks before they started eating MP. should i starve them? and if so can they not eat for 3 weeks?