Livestock Roundup Covered by Auto Policy?

We recently had a claim where our insured was towing a stock trailer with his pickup truck and had an accident. The stock trailer jack-knifed and rolled into a ditch after coming loose from the pickup. Three calves escaped unharmed from the rolled trailer and ran into a nearby cornfield. This accident happened thirty miles from the insured's farm and it took the insured three weeks and several trips to retrieve the calves.

The auto insurer paid for the damaged trailer and for the property damage to the surrounding cornfields where the escaped calves wandered and fed. Our insured also submitted a bill for labor costs to retrieve the calves, but the auto insurer denied coverage. We think that the retrieval should be paid by the auto insurer because the insuring agreement states that the insurer “will pay damages for BI or PD for which any insured becomes legally responsible because of an auto accident.” We think the labor for retrieving the animals and preventing further property damage to be part of this broad agreement. What do you think?