DP Cross chicks allude to a deliberate hybridization of two distinct chicken breeds through crossbreeding. Desirable characteristics from both parent breeds may be present in these hybrids.
Sonali chicks are a breed or variation of chicken that can be used to produce eggs as well as meat. It's typical to have access to both male and female chicks.
It's likely the case that grill COB 430Y is a particular breed or strain of grill chicken distinguished by its rapid growth and excellent meat yield. These chicks are raised to produce meat.