Today I got a call from my mom out at the barn to tell me she thought Nick was colicing (sp). So I went out there and we called the vet.
He came, did a rectal exam on him, checked his gums, sedated him, put mineral water into him via a tube up his nose, and now have been instructed to walk him for 10-15 minutes every hour. He's to be given a 1000 lb dose of Banamine around 2/2:30.
Just a small update.
The vet said it was probably due to him not liking to drink cold water. So now we're on a search for a way to warm up the water in his stall. He has an automatic watering system in his stall and in the run-in but neither is warm - just thaw.
We would come outside with a hot tea kettle and pour about a gallon of water in 2-3x/day... It kept the water luke warm through the evening... Though, we used a small 20 gallon rubber tank... I've seen many people just put a plug in warmer in the water.
You can also try giving him warmish molasses water to keep him hydrated. I pour about a table spoon or two of molasses into a bucket and fill it part way with hot water, stir it around until the molasses dissolves, then fill it the rest of the way with lukewarm water. The majority of horses will suck a 3-4 gallon bucket of this down in one go. When I'm really worried about a horse's water intake, I'll give him 2 or 3 of these per day. The rule of thumb I have heard is that horses should drink about 5-10 gallons of water a day, so if you give him 2 or 3 of the molasses water, he should be staying fairly well hydrated.
Six months?! That is brutal! Glad to hear you now own him, what a horrible situation. He looks a lot healthier in your photos already, but a word of caution-make sure you don't feed to much or food that is to rich. You don't want to throw your new horse into a bad colic.