Hi Trishga:
I'm sure others will join in soon with more information for you - I had a PEG tube, but cannot remember the formula I had (lot of help I am) but I think any kind of formula (Carnation VHC Instant Breakfast, Boost) would work, along with lots of water. I'll search back and see if I can find the formula the RO and chemo drs. recommended, and if so, I'll send another message. My insurance paid for it, and it was delivered to my house. I just wanted you to know someone read your post, and others will soon. A big hug for your Mom (and you).
julieann