Does your son eat feces? Sorry, I couldn't resist. You make a valid point but I think every dog owner has their preference. Think about the old days, when dogs ate whatever you fed them, lived on a farm with hardly any vet visits, no heartguard, frontline, or even vaccine shots.....my grandma's dog lived to be like 20 years old..no joke. My neighbors outside dog is like this and is 16 years old.