Mr. Conor Geraghty:

It will not on its own because parasitic diseases can be prepatent. Checking fecal egg counts is quite useful for managing roundworms but the issue of pasture contamination is not solved by individual fecal egg counts. For example, if we apply a threshold of 200 eggs per gram and dose above that, if the stocking rate of one farm is twice that of its neighbour, those 200 eggs per gram on twice the number of cattle per acre will contaminate the pasture much faster. The invention needs to be earlier in that case. It depends on how tight the grazing is, whether the farm is using a leader or follower system and so forth. It is not as simple as counting the eggs and then dosing. It does not work that way.