What should i do, please help!?

ok so i have 2 hogs that i will be showin startin in December. well the first hog show is the same night as my schools choir concert. i love showin hogs and if i dont show him at the first show i dont know how he will react at the next one. but if i dont go to my choir concert then i wont get a grade and she will be mad! we have put more money in the hogs then into choir.. i just dont know what to do! please help me!