Take these situations
A: You are a doctor that sees a dog with a cut on its leg that looks infected and needs stitched. You happen to have a needle and thread on you, and a shot of *insert random antibiotic* , now do you sew up that dog and give it the antibiotic or do you not and let it suffer because you are not a veterinary doctor.
B: You are a veterinarian and someone you know has a cut on their hand. Perhaps in your clinic, or perhaps just a friend. Do you have them go to a doctor and spend lots of $$$ to get it sewn up, or do you do it yourself? (I have several relatives that have got this treatment from a local vet actually... but i do live in hicktown, Arkansas)
C. This one happened to my uncle, He dislocated his shoulder in a softball game. THe only 'doctor' around was a veterinarian. The veterinarian walked up to him, felt the arm to be assured it was dislocated, and said, if you don't mind a veterinarian doing it, I can pop this back in for you. Was he wrong to do so?
Hello lawsuit. Good-bye vet license. In an emergency, call 911. Do what you can do apply remedial first aid, but for God's sake, do NOT do anything beyond that. If you're not an EMT, stop and call 911.
I'm an MD and a JD. I have two pets who I love more than people. I love my cats. When my one kitty got her collar (how, I have no idea), wrapped around her armpit, which caused a severe abrasion, bordering on laceration, that became infected before I got home from work, rather than attempt to treat her myself, I captured her, removed the collar, and brought her to an emergency vet service. Could I have treated her? Perhaps, but in reality, even though I knew there was an infection due to the odor and pus formation, I did not know how bad it was or whether it required stitches, etc. Only a vet would be able to tell this.
Likewise, while I'm sure vets know a great deal about "medicine" in general, human and vet, they are not trained to spot signs and sx's in humans nor do they know human pharmacology. There is a reason why there are two separate professional schools for humans and animals.
As an attorney, I can honestly say, in a crisis situation with a human victim, do your best to administer remedial first aid, but call 911 and do not expose yourself to liability. In most places, vets are not protected by Good Samaritan health care provider statutes. Now, if you're a DVM and a licensed EMT, hey...go for it! If you're an MD or DO and an LVT, go for it. Otherwise, stop.
Going back to the OP, it's always easy for an anonymous tool to give medical advice on a forum. This MD has no business dispensing specific medical advice, human or otherwise, an any forum without a physician-patient relationship. Giving general medical advice is okay, but should be limited, general, and always followed by "see a physician" or "see a veterinarian".