HENRICO COUNTY, Va. You might not expect to find your next best friend at a Walmart, but that is exactly what happened on Saturday at a Henrico store where Richmond Animal League set up a free pet adoption event as part of a nationwide push during National Pet Month.Adoptable dogs and cats from the shelter were at the Walmart Supercenter on Nine Mile Road for the "Give Love. Save Lives" event, with all adoption fees waived. The event was part of…