Internal disease can happen at any time, as horses love to do weird and wonderful things!

Illness Assessment

If one of your horses becomes ill, you will see a red [I] next to their name in the stall list and on their page. You will also receive a notification that they are not feeling well. If you see this, it's time to head over to the Veterinarian. There are 5 possible internal illnesses in the game:

Gastric Ulcers
These can happen when horses get stressed, causing them to have stomach pain. This makes for a pretty cranky horse! Ulcers take about 6 months to recover from.

Medical Colic
Medical colics are pretty minor, and can be managed with medication alone. Horses can recover pretty quickly, usually in about 1 month.

Surgical Colic
Surgical colics are very bad colics, usually caused by some part of the intestine twisting. They are very very painful! Recovering from surgery can take up to 1 year.

Diarrhea
Horses can sometimes get diarrhea from infectious causes, but sometimes it can just be due to stress, feed, or medications. If it's an infectious cause, you want to quarantine the horse for at least 4 months, just to be safe.

Choke
Horses sometimes will eat too fast and not chew properly, causing them to choke! Don't worry, horses can still breathe even when choking. Usually the recovery for these is pretty quick, only taking 1 month.

Stall Rest and Rehabilitation

After the veterinarian assesses your horse and diagnoses the problem, your horse will likely need some stall rest and rehab. Horses on stall rets/rehab have a black [I] next to their name on their page and in the stall list. They also cannot train or enter shows. Their rehab time will count down with each Month Rollover, and the [I] will disappear when they're ready to work again!