Well we did an experiment to see if the bulls were working, we AI'd a load of cows and then left 4 alone, well they came bulling and 1 came bulling back again. We tested them all, via milk as it has proved exceedingly accurate and there is a 5% chance with the vet that the messing around in their backside can cause abortion, or so people say. Anyway 3 out of 4 are in calf, definite, so we are all really ecstatic atm. Now for PDing the other herd, plus ones dried off, which will mean the vet, to see if the other bull is working. Who'd have thought it would take this long!