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.
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.
you have to congratulate someone on there birthday :)
100 droppings
an apple someone sends to you for an objective
Howrse has a page for people's birthdays. Click on one of them and then you click congratulate.
I'm not sure what you mean by "finish". On Howrse, you climb your way up the social ladder, becoming the best breeder/player!
When you get to the objective that tells you to name your horse "Tip", then you will get a prize for completing the objective.
You have to find a foal game schedule. If you are on International Howrse, there is one in Dr. Zig's forum.