We just started feeding Origen Senior to our 10 year old...
Just be sure to go slow... I switched our girl over to Origen, and we tried two days of a 1/6 - 1/4 Origen + rest of old food, and that was fine... but then we upped it to 1/2 Origen + 1/2 old food on the third day and she had a bout of loose stools and grumbly tumbly. We went back to 1/4 and it worked well... and after three more days we tried moving up to 1/2 Origen again and everything was fine.
It really is dense food, and takes their systems a bit to get used to, especially if you have not been feeding grain free before the switch.
All her watery eyes and allergies have completely gone away... bad side effects from a good brand that went bad... (without me noticing sooner - always have to keep an eye on those ingredient lists!!)
She is 7 lbs. and we feed her between 1/4 and 1/2 cup a day, but she is not a couch potato Yorkie - we take her for incredibly long walks with her German Shepherd sister (think 1 - 4 miles a day). Even after these walks, (after a nap or two of course) she still seems to have an enormous amount of energy.
She really seems to like the kibble too. They are small, but not so small that she doesn't have to chew. Gotta keep those teeth clean!
)
Hope it is going well for you!!
