I'm getting a guinea pig... Bulk hay?

you should go to a local farm and by fresh timothy hay from them. its safer, and cheaper. also you should only feed your piggie 4 tbs a day. two in the morning, and two in the evening. if diarrhea occur's, go to only 2 tbs a day. and more then likely your gp will try and tear anything up. the first guinea pig i got, i had cage liner (absorbant paper suggested by the vet) and my piggy ripped it to shredds. luckily i had non color print newsppaper underneath. good luck.