My sisters little one has horrible gas issues... 80% of his day he's screaming

She's spoken with the doctor and they've been doing gas drops and are now onto a soy based formula because they are thinking he's got a allergy. Just wondering if anyone had any home remedies or found anything that worked for very fussy, gassy babies! I feel so bad for her and wish their was some helpful advice I could give!
Re: Gas Issues
Tummy time has helped LO with her gas bc of the pressure on her tummy. Warm baths have also helped.
BFP #1 11/07/2012 EDD 07/09/2013 M/C 11/22/2012
BFP #2 02/05/2013 EDD 09/19/2013 Arrived via c-section 09/27/2013