I have checked my horse's teeth, but I'm short & have my tall husband to help. I have a good flashlight, I can hold the tongue to one side while I check the other side. Also I do have a speculum, but it's very heavy & hard to use, but can be done. But I thought the question was just about checking? And if you think you feel or see a problem, then call a professional. I remember having a paint, the vet said she had a "wavy" mouth & should be looked at every 3 or 4 months.She was an easy keeper, never had wads of food, or any bitting/head tossing problem. If I had seen anything, I would have taken her in, but she lived out the rest of her life quite happily w/out seeing that vet again. I think I had her for another 4 years or so after that vet floated her teeth. And she over-sedated her also-she never asked her weight & I could barely keep her on her feet while she was being floated, she could have put her in the stocks, but she didn't. Needless to say, I tried to not get her again in the office rotation.