Effects of a prolonged fever?

If your horse was ill for two weeks with colitis, then the vet was very much involved. You need to ring that same vet and express your concerns to him/ her.

Having said that, as a retired equine vet tech, I've seen many cases of colitis and no, it's not often fatal -- so long as it's being treated properly. More concerning to me than the high fevers was the risk of dehydration that came with the pipestream diarrhea. Metronidazole was used to address the infection in most cases along with IV fluids. The fevers usually became normallized within abt 3 - 4 days.

Are you sure she suffered high fevers for 14 days straight? Or was she in the clinic for 14 days, and fever was one of the symptoms you knew she suffered? You mention her receiving shots of banamine Q5hours "because they didn't think she'd live". May I ask... who is "they"? THAT is the person you need to verify duration of fever, specifically if it's still very much worrying you.

IME, my biggest concern with fever is laminitis. And you would know by now if your horse had suffered a bout. You say this happened this summer, but don' t mention your location. In any case, it would seem several weeks have passed since the treatment for colitis. Best bet is to have the vet recheck your horse for weight and soundness/ ability to carry a rider. Colitis can really emaciate a horse and you may still need to get her weight back up before considering riding. Then, have your vet design a rehab program for your horse, ie 5 minute tack walk for 10 days, then 7 minutes for 3 days, then 10 for 3 days with one lap of trot, then 15 minutes of tack walking with 2 laps of trot work, etc..

Good luck.

My horse has survived 2 massive infections. one was 3 or 4 years ago...colitis. it was touch and go for several days and we had him on massive amounts banamine too. He pulled through and their were no apparent residual effects. The second infection was this summer. He had an upper repiratory virus that turned into Lymphangitis. The fever held for nearly a week ...even with the vet coming once or twice a day and all the cold hosing. 103 -104 for almost a week straight. 3 types of anitbiotics and steroids. again...he cheated death and pulled through. This time though the lympnagitis leg had some residual damage/weakness and is still weaker than the other 3 limbs. I was most concerned about founder...but for whatever reason this did not happen. about a month later the entire frog was sloghed off the hoof...and a new fresh one grew back in its place. I'd say if she pulled through, just keep an eye on her feet for heat. If you haven't felt heat yet hopefully she'll be ok.

Banamine is safer than Bute, and two weeks isn't that long. I've known horses on bute much longer that 2 weeks with no lasting effects.

I had a 2 yr old filly who ran a high fever for almost 2 weeks. She did get some edemas along her belly and chest, and she stocked up some, since she wasn't moving around much. Once she was able to move around more, the edema went down.

She also became anemic, but we didn't know if that was the fever, or something else. She was pretty sick for a long time, and we never did figure out what was wrong.

If your mare acts fine, her blood work is fine, then I would think she's fine. Just start out super slow and gradually increase her work and she's able to handle it.

Good luck!

My mare was at the university clinic for a week with colitis. When I brought her back to where I board, we put her back in her pen. I noticed she didn't walk very much. A horse needs movement to keep the gut moving. Wild horses walk for miles each day. My mare stood all day. So I started giving her a bran mash that a vet once recommended (he now works with the race track). Wheat mids or bran mash or you could even use beet pulp. Mix in enough water to make it almost a sludge. Add some oats, not much. Mix and jump back or be trampled! The universities claim there is no recognized benefit from the added fiber in the horse's diet, but I disagree, and my 30+year old mare is the proof that it does work, and I used it on her mother decades ago. I bran mash my horses routinely and particularly before and after worming. Safe, effective, inexpensive, the horses will love you, and it's harmless.