I don’t know if I should try feeding it to him again or purchase a new bag. Any recalls on taste of the wild pacific?
If he's been eating this food for awhile with no issues maybe it's not the food that made him sick. You could Try taking a break for a few days by just feeding ground turkey & rice then gradually add back the kibble. Maybe he just had a stomach bug.
Has he been on this food a while or is this a new food for him? Be sure to transition gradually to new foods if your dog is not used to eating a varied diet.