Early retirement after all, then.
There are just a couple of minor problems with this idea:
1. You can't cross human beings and horses. It simply doesn't work.
2. Barney is a male.
3. Barney has been gelded.
4. Barney would reject your skinny little jewcock anyway.
Apart from those details I'm rather keen on your idea of the jewhorse. Like Mel Brooks' jewish Indian chief in Blazing Saddles. Except it would be Mel Brooks' horse, rather than Mel Brooks. Obviously.