When you click it, you choose how long it takes (say 1 hour) then it actually doesn't take 1 hour but its actually finished its just that in the game its been 1 hour not in real life.
ON YOUR HORSES PAGE there would be a training icon beside your horses photo and then select you time length for the training
Click 'feed', and then click mashes>>health mash.
What is the objective
You just train one of your horses for 3 hours.
u have to go to the page of one of the horses that you produced, and then you click on training, and then you have to finish all of it (it takes a long time :( ) hope this helped!
You breed a unicorn. Period.
100 droppings
you have to congratulate someone on there birthday :)
an apple someone sends to you for an objective
I'm not sure what you mean by "finish". On Howrse, you climb your way up the social ladder, becoming the best breeder/player!
Howrse has a page for people's birthdays. Click on one of them and then you click congratulate.
When you get to the objective that tells you to name your horse "Tip", then you will get a prize for completing the objective.
If you are talking about the Objective: Finish last in five competitions with a horse, that's pretty simple. Just tack up a horse with barely any skills that is over 3 years old, and enter him in competitions. If he finishes in last place (5th), then that will gain your percentage of completion up by 20%. Finish in last 5 times, and it will be completed!