(defendant, who was charged and plead guilty to being a felon in possession of a firearm, used or possessed firearm in connection with felony offense of cruelty to animals by killing pit bull that bit defendant's son; killing of dog not necessary to abate nuisance even though dog had bitten its owner on prior occasions and had acted in vicious manner toward passers-by in prior six to seven months; dog owner had agreed to address dog's behavior after defendant's son bitten; four-level enhancement to defendant's sentence for possessing firearm in connection with another felony offense warranted - 60-month prison sentence upheld).