How Low Can Ya Go?

 If she does well on grain free, I would probably feed her one of those, reduce the portion down to what she needs and "bulk up" the meal with some green beans, so she feels full but without lots of extra calories. 

If that doesn't work then I'd look into other reduced fat foods, but I'm afraid I don't have access to most of the foods available in the US so I can't offer any particular recommendations.

4HAND

She usually recieves one cup twice per day but I have reduced that to 3/4 cup since noticing

WOW! My beagles get 1 1/2 c per day...Cleo weighs 85lbs and gets 6c per day...but she's a growing pup...

Have you gotten her thyroid checked out??

 Eeep, the numbers didn't register.  Gina's right, if she's not losing weight on that amount of food I'd have a blood/thyroid panel done, too.  My 69 lb lab eats more than that of a calorie dense grain free and it only *just* keeps enough weight on him.  (Which is how I like it.)

My Callie has been doing really great on Wellness Core diet formula...which is grain free She had to lose about 10 pounds...she wasn't obese, but she was carrying some extra padding and she  needs to be at a lower weight due to her double knee surgery. She was almost 55 pounds when we started the Wellness Core diet formula. She is down to 47.4 pounds now...it's been about 4 weeks. What I do is mix 3/4 cup of the kibble with a 6 oz can of the Wellness canned food. I stuff about 1/3 of this into a Kong and freeze it for her breakfast. The rest I put in the fridge for her dinner later. The kong keeps her busy for awhile and she doesn't seem like she is starving after eating it, which has been a huge help. For dinner, she gets the rest of her daily portion, and sometimes I add some cooked string beans or cooked carrots to the meal for her. That is ALL she gets. It's been harder on ME not giving her any treats...lol..but I got over it.

Good luck with the weight loss.

Wellness core reduced fat is grain-free and only has 350 kcal/cup; what kind of exercise does the dog get?

Never had her thyroid checked but she's been on two cups a day since she was two years old.Supplemented with some table scraps,ok alot of table scraps but those are a thing of the past now.The fact that she was losing weight on the Nutro makes me think it's a calorie thing not a thyroid thing but only having the test done would tell for sure.

 without looking it up I believe that EVO reduced fat is still high in kcal per cup - I would think much more kcal dense than Nutro.  I would reduce the EVO rf further and add green beans - I use canned rinsed and crush them with Bugsy when I home feed.  He loves them.

Senior dogs need plenty of protein for maintaining muscles but low fat.

I think it is always good to remember that unless you are talking about the same food one can't say I feed 4 cups vs 2 cups of another.

edit:  Looked it up and it has 440kcal/cup so that is about 1100 kcals of kibble - several iDoggers have dogs on significantly less - Willow the Chow is one example iirc

I just don't know...I would get a full panel done, personally. Weight is a lot easier to fine tune when the thyroid is in balance. And to echo mudpuppy...whats her exercise level like to be a good weight on 2c?

well on that food mine wouldn't even get but a few kibbles apparently LOL. They'd be hungry all the time, too...LOL.

rwbeagles

well on that food mine wouldn't even get but a few kibbles apparently LOL.

I recall the days of pouring mounds of food for puppy Bugs    He still eats a ton but it has tapered off, thankfully

I did know about wellness core but can't find reduced fat formula in my area.Best I could find was TOTW's bison formula was I believe 370.As for exercise she accompanies me around our 40 acres at a walk/trot and plays with my son's Aussie alot.For her age/breed/condition I think this is as much as she can handle.I also think arthritis pain may be slowing her down some.She used to run faster and for longer periods.I was hoping to get her more comfortable by her next vet appointment and avoid using a pain reliever.

Tena

I've been thinking the same thing lately with my lab Monroe.  He is a very large dog, the vet thinks that he should be at about 88 lbs and this is a vet who agrees that slimmer dogs are much better off than those you might see in a dog show.  I know that some vets think that having a little weight is good but this guy doesn't, that is why I like him.

Monroe gets 1c of Canidae morning and evening with green beans and training treats in between.  Yeah, he's hungry but I think that is his natural state.  He has also been swimming for at least 40 minutes/day along with the usual off leash antics.

In the last 6 months he has gone from 104 lbs to 92 lbs.

It seems the dog is eating only 680 kcal/day

 On the Core RF - ask at the place that sells Core - many times they can order it for you, no additional charge.  Core is a terrific food and I suspect may be just what you are looking for.

My Maggie eats about 450 kcals a day.  That would be just a little over a cup of Core, depending on how much the kibble in the bag I got, weighed.  She weighs 40 pounds and is very fit and active, and is almost 15 years old.  So, it's not out of the realm of possiblity that an 80ish pound dog would require around 650 kcals to effect weight loss.  I couldn't get weight off Gus (47 pounds working dog) until he was eating ONE cup of Core RF a day - or the equivalent, actually, since we did both kibble and RMBs.  Zhi eats like five kibbles of a normal grain free like Evo.

However, it's a good idea to get one thyroid check done on a senior dog, even if just for a baseline for later.  Thyroid function can slow down with age in dogs predisposed to it.