Years ago I was attacked by three Pitbulls. I was able to draw my Deparment Sig-Sauer P-229 .40 loaded with 180 grain JHPs and doubled tapped each Pitbull center mass.Neither of the Pitbulls acted as if They were shot.The sound of the shots turned Them and They retreated into a wooded area.
When backup units arrived we hunted down the pitbulls and finished them off with 12 gauge shotguns.
If I was in yours shoes I would pack a Glock Model 20 10mm loaded with JHPs. ( and a pair of fast running shoes)