What should you use to clean an open wound on your dog?

The best thing to do is to take you're guinea pig to the vet. But, on our guinea pigs we use a special ointment very similar to Neosporin that is actually meant for dogs, but is great for small animals to use as well. Our brand is called tritop, I'm not sure if every vet uses the same brand (I'm assuming not). Also, olive oil is NOT unhealthy for guinea pigs. It isn't poison for them and it is actually good for guinea pigs to lick off. Olive oil is actually used most for guinea pigs to help with stomach problems. We use it on our guinea pigs to help sooth dry and itchy skin, NOT to clean cuts. If it is in an area your guinea pig can't reach Neosporin will also work. Just make sure then that your guinea doesn't ingest it. If the wound is caused from another guinea pig in the same cage you should separate them (we had too) because more injury could be placed upon them, if the cut is from your guinea pig scratching themselves make sure their nails are clipped shot, and that they have no irritating patches of skin on their body. If they do DO NOT USE LOTION it is not helpful, and is most likely poison to your Guinea. You can you 100% olive oil (make sure nothing else is in it) or coconut oil, both are not dangerous to Guinea pigs.