
Richard Leonhart |

are you saying your animal companion doesn't drink water?
Just put it in a bowl for him.
Is this really something your GM has bothered you about, or do you want to ask as a preventative measure.
Also you could freeze it and serve it as crushed ice, inject it in meat, or put like gelatine in it (or whatever the magic dark-age alternative is).
This really should not cause concern.

sunshadow21 |

I've seen it done a number of ways, and honestly, as long as the proposed application seems reasonable for a standard action, I as a DM have no problem with it. It's still a one-off magical shot in the arm regardless. Potions are one of the most ignored and/or maligned magical items, and anything someone does to make them interesting is well worth the effort of the refluffing.

Baelin |
This falls entirely under GM's jurisdiction but my 2 cents is that it should be allowed depending on the culture of the setting.
The default potions and oils is of course a bi-product of D&D's roots in European medieval/renaissance culture. In Asian-inspired settings, where such things might seem a bit out of place, I've encountered potions in the form of large pills (mostly due to Naruto-influence probably), medicines, incense or poultices applied directly (and of course the ever-lingering threat of the implied potion suppository). Regardless of form, the end result is the same.
The only real requirement is that 1)it needs to be something that you can concoct with exotic herbs and spices. 2) it requires a standard action to administer or use.
Some GMs also allow potions to be used in more unusual ways rather than straight from the flask. Snow White's Wicked Witch/Stepmother steeping an apple poison potion is one of the classic examples of this. As is the implication of special blessing wafers containing divine spells.