I just introduced a baby rat to my three month old rat. Help.?

well u cnt force a rat to do wat it dnt want..if the rats dnt want to run in the wheel...big deal...u wasted 2 bucks...and rats have personalities like humans...if the dnt want to run and romp...big deal..(u did the right thing getting another one though)...just cause their not go giddy playing rats dnt mean they dnt enjoy the company.plus the other one is oldr and use to being alone....ur parents dnt expect you to go run around a play witheverone they introduce you to do they?....