My initial research shows that a few years ago PETA attacked IAMS for their research practices. I imagine any “donations” were actually blackmail payoffs. Seems like a danged if ya do danged if you don’t situation. If they don’t get PETA off their back they loose sales to their large consumer base of average pet owners, if they do then they loose hunters. The second of which I would think is a much smaller part of their revenue.

Of course that is just speculation.