Apologies for my delay, I was called away to an emergency for a patient yesterday and wasn't back til late.
Anyway, I am so glad to see it was just a graze and not a puncture or tear. Usually with grazes we need only treat topically. To do that, you can start by cleaning this 2-3 times daily with a mild antiseptic (ie dilute betadine, chlorohexidine, or salt water). Afterwards, pat the area dry and you can consider having the local vet dispense an antibiotic cream for this but as it is not severely raw we may not necessarily have to use that. Otherwise, do rest him +/- warm compress the leg a there will be bruising/discomfort at the level of the muscles. If he was very sore or favoring it a lot, then his vet could dispense dog safe anti-inflammatory medication (ie Metacam, Rimadyl, onsior, etc). But otherwise do keep an eye on his appetite, it should get back to normal as the discomfort from this attack fades but we can tempt him to eat with a light diet (ie rice with boiled chicken, boiled white fish, scrambled egg, or meat baby food (as long as its free from garlic or onion powder)) if need be.
Afterwards, as I am giving you my own free time, please take a moment & rate me with the **STARS** (or leave a written rating of 1-5; 5 being great). Otherwise the site won't credit me for helping you. There is no extra charge for this & rating me now does not close your question. We can continue until you are satisfied, simply use the reply box and let me know. Thank you! : ) **