Xobaline is recommended for diabetic neuropathy and contains one form of B-12 only, not the
whole spectrum of B vitamins, nor of vitamins in general.
Absorption through the gut is a problem with IBD. If you are giving
Sub-Q fluids, you can add B-complex through the fluids.
For general health, I have used VetLine Feline Vitamins, a powder you mix into food.
You can also take a regular human B-Complex vitamin pill and crush it. Put a small amount
into each meal.
B-vitamins are water-soluble and any excess is excreted through the urine (makes the
urine darker yellow, sometimes). Hard to overdose on B-vitamins.