Just a Mort wrote:
Get your fluffy to take narrow frame/buy a belt of tbe weasel for your fluffy(if he has item slot to use it).
Otherwise you UMD reduce animal, or do ancient lore keeper for reduce person. Due to share spells, your animal companion qualifies for reduce person. Or dreamed secrets.
There are no domains or mysteries that give reduce animal on your spell list.
Um... it seems that neither solution is perfect...
I don't like ancient lore keeper, since the +2 dex/+2 int/-2 con of elf looks bad as an oracle for me. The DC 20 will save demanded by dreamed secrets is a little harsh as well. At Lv 7 I guess I will be about +8 will, and the DC would be too high.
I think I wound UMD reduce animal scrolls, in order to save a feat for my lovely (yet Large) cat :)