I have been trying to help my friend with a snake he rescued from being killed and we decided it is a chequred keelback. It has a small injury near its mouth, perhaps from when the people were trying to kill him, and he isn't eating. He has had this snake for 4 days now and it isn't at all aggressive but it is still very active and likes to explore. We could really use help in knowing how to get it to eat. There are no reptile experts where he lives so there aren't many people he can go to. He's tried giving it frogs and I have suggested worms or fish. We are also wondering his the small wound by his mouth is keeping him from eating. If you guys have better knowledge of keelbacks and have any advice we would really appreciate it!