We are still calving out (ALMOST DONE) only about 24 left to go but this year we have (so far) 90% bulls and not many heifers. This was the year we were going to keep all of our heifers also.  :?

I did have a set of twins 1 bull and 1 heifer - someone told we that the heifer would never be able to produce calves.

2 bulls will produce

2 heifers will produce

but

1 bull 1 heifer and the heifer would be no good

Does anyone know if this is true????