
Hiya,
Never owned my own, i have to say, but been around them longer than i care to recall!!!!
Sounds to me like your colt could change to a dun, or a dark grey (steel gray?)....the stripe down his back would suggest a dun, but who knows! I know of one colt born jet black, by the time he was three he was a blanket appaloosa sort of thing...black body, but #wiuth a white backside, with black spots!
As far as the tail chewing goes, errrrrrr is there anything you could use to spray on the tail? Is the gelding letting him do it because his tail is itchy? Not sure on that one really.
As far as gelding goes, depends on what you want to do with him, how his temperament is coming along, how long he takes to mature etc etc..... Not all stallions are nasty buggers, but some can be right little gits....however geld too young, and you could risk spoiling his growth....colts left until 2 or three often develop a very showy stalliony look about them, BUT can also retain a stallions temperament as well.....if he was mine, if he is being a bugger, get him cut in a few months time, depending on how he is growing.....if not, and you have plenty of time to handle him, leave him be. Thats my own personal opinon though....
One thought, he could be chewing the geldings tail because he is bored, in which case, get him doing stuff, its never too early....My dads neighbour used to pay me to 'play' with his foals, that was from pretty much the month they were born, as he favoured the 'turn 'em out with a stallion an let them breed' method of stud farming.
I used to get them used to being handled, feet, ears, faces, bellies tails, backs, touching all over, get them used to buckets, straps of leather, lead ropes, hoof picks.
By five months, i was usually taking them for walks, taking them to see traffic etc, and cows and sheep and dogs.. socialisation for a horse is much the same as for a dog!
You could also give him toys to play with? swedes on ropes etc?
Just some ideas,
Em