I would say it depends on how bad your back is. My back and knees are pretty shot from veterinary medicine. I currently work in vet med ER and have been in this field going on 12 years (& just started CNA on the side). I'm well into my 30's and decided it was time to pursue my dream of becoming an RN. I am currently in my second semester of an ADN program and it's the best decision I ever made. It's nothing compared to wresting, getting bit, and lifting those huge dogs with no help. You are on your feet all day, twisting and turning (no different than vet med), but at least you're not physically on your hands and knees ALL DAY. That killed my back. I have a coworker who wears knee pads to work, I don't want that to be me. I have many friends who made the transition from RVT to RN and feel spoiled because of it, they wished they could have done it sooner. We were so used to doing everything in vet med ourselves; the pharmacist, the tech, helping in surgery, X-rays, blood work, discharging pts, helping reception, answering phones, CPR, setting up for endoscopies, and echos / US., laundry, sweeping, mopping, etc. I'm so over it LOL. Honestly, even being a CNA is better than vet med LOL. It also depends on what state you live in, look into the nurse to patient ratios. I think if you want to try something new, there are MANY things you can go back to school for. Maybe go be a phlebotomist. They make more than RVT, I know how hard it is living on that salary. Either way, do what makes you happy (and what your back allows), don't be afraid to make a career change. There are options out there. As for me... It's been so amazing to watch these nurses, these real life super heroes do their thing. And I can't wait to be one of them. Good luck!