yes you can as long as brakes are on and jockey wheel is down Dad often used to take us jumping and unhitch the trailer so he did not have to stay all day we loaded and unloaded between classes never had any problems although these days you would need your trailer lock as someone may hook it up when your not looking
I wouldnt.
My horse freaked in my old trailer whilst practicing loading. It was attached to a car with both jockey wheel, brake and prop stands down and it bounced all over with the prop stands ending up not being down, if you know what I mean. Dread to think what would have happenned if it wasnt hitched to the car.
It wouldn't have the weight of the car holding it down at the front and steadying it, meaning if your horse decided to thrash about it could turn over a lot more easily.
Do you have a tractor you can hitch it to if the car isn't there? We pull ours out of it's parking spot with the tractor (as it's easier than using the car as the tractor shed is next to it). Depends what attachments you have on tractor I suppose.
Are you aiming to practise loading? Wouldn't load if not hitched, but I would perhaps just familiarise with the trailer ramps for now, maybe allow front feet only on for a feed every time till he gets used to the bounciness and feel of the ramp and make it a nice experience, that's half the battle.
yeeharider - Sorry but that was very dangerous loading and unloading into an unattached trailer. Maybe it wasnt so bad if you had little light ponies but I wouldnt ever do it personally. Its not designed for it - That jockey wheel is tiny when you look at the weight of a horse!!
I am sure there is something in the Riding Club rules that you are not allowed to leave an unhitched trailer at an event, I was told this when I forgot to take my pasport once and wanted to drive home and get it without the trailer.
I'm not sure it is a good idea to try and load when the trailer when it is not hitched up tho.
Contraversial here but i've loaded into an unhitched trailer plenty of times, with wheels well chocked, the jockey wheel low - so the centre of gravity of the trailer is a lot lower, handbrakes on and on a really level surface.
Have also had to have a horse stabled in one for a week that under no circumstances was allowed to lie down so keeping it eseential in a tight stall was what was necessary, it wasn't very big - 14.3/15 hh ish and never had a problem....