Well you can wait for one of your horses to die :) or...
well ... get a cheep horse you don't really like and age them a bunch of times without taking care of them... it's barbaric I know but it will work :(
What is the objective
You breed a unicorn. Period.
You have to "kill" a horse then click "send this howrse to heaven" (not the safe haven). To kill a howrse work it until its energy is below 5 then age it. It should die! Or wait until it gets to 30, then its health will drop very low and it will die, and if you do the "send it to heaven" you'll get a pass! Hope this helps LeaBuff
an apple someone sends to you for an objective
you have to congratulate someone on there birthday :)
100 droppings
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.
You have to find a foal game schedule. If you are on International Howrse, there is one in Dr. Zig's forum.
It doesn't mean anything really. It's just an objective Howrse makes you do.
It's $53 In US Dollars.
Profile > my account > invite friends From this page you can enter the email address of a friend and invite them to sign up to the Howrse game. If they complete registration then you pass this objective.