How much cat food a day?

[Lori in Ohio]

How many ounces of canned cat food should a cat be fed a day to maintain its current weight?
How many ounces do you feed your cats?

I have a cat (non-diabetic) that needs to gain weight, so I'd like to know the guidelines for canned food in maintaining, so I can figure out how much more to give him.
He is only 7-1/2 pounds right now. Use to be 14 lbs.
The doctor put him on a low dose of anti-thyroid medication (even tho his T4 and Free-T4 tests came out normal) because he has all the symptoms of an over active thyroid.

 

[KristenP&Sam]

If he needs to gain weight, I'd say put out as much as he'll eat. I tried scheduled feedings per my vets stern advise, but quickly abandoned that when my other 3 non-diabetic cats started wolfing their food so fast then would then throw it up. Now I feed throughout the day as they want it and that seems to work great.

 

[Sue and Oliver (GA)]

It is partly that "every cat is different" thing. It depends on their activity levels, whether you want them to gain or lose weight etc. We have a civie, small Russian blue who plays once a day, is an inside cat and his ideal weight at 7 pounds. We feed him 2 cans of Fancy Feast daily. We had a diabetic Maine Coon - overweight at 14 pounds. Once he was regulated and not starving, we fed him between 2-3 cans FF. He was also indoors with a very low activity level.

 

[Lori in Ohio]

Thanks Sue,
He is very active, especially for a 15 yr old cat. The thyroid meds have slowed him down slightly.
Right now he is eating 3-4 FF cans a day.
My 11 yr old, large Blue Russian 18 lb cat eats 1-1/2 to 2 cans a day.