BG and HBG don't mix well genetically or competitively. The HBG are 90% +- male and compete with the male BG. There is uncertainty if HBG can backcross with BG and if so what the result will be.

The main advantage to HBG is their ease of catching and secondarily their early growth rate. This may not apply well when mixing BG and HBG.

Not something I could suggest.