hi pal i had a greyhound rip open his leg you could see reight through i gave him a jab of penecilin cleaned it 3 times a day with salt water and gave him amoxacilin caps for 10 days the dog is fine and you cant even see were the rip was if the rips are not life threatenin for the dog then these things work well plus all lurchers and terriers are fast healers when it comes to skin