Hi Lisa
Here is a list one of our members posted, I know this list is low carb also for our diabetic kitties but it also lists the phosphorous levels
First number is carb percentage, second is mgs of phosphorus/100 cals, all less than 10% carb and less than 250 mg phos:
Weruva Truluxe Steak Frites can 6% 118
Weruva Cats in the Kitchen La Isla Bonita can 3% 166
Weruva Cats in the Kitchen Pates Meowiss Bueller pouch 7% 174
Weruva Truluxe Glam 'N Punk can 0.6% 180
Weruva Cats in the Kitchen Fowl Ball can 4% 180
Weruva Classic Pates Jeopurrdy Licious pouch 4% 187
Weruva Classic Pates Family Food pouch 0% 191
Weruva Cats in the Kitchen Pates Cattyshack pouch 9% 211
BFF PLAY Tuna & Salmon Shhh... pouch 3% 223
BFF PLAY Tuna & Turkey Totes! pouch 2% 226
BFF PLAY Tuna & Chicken Chill Out pouch 2% 226
Weruva Cats in the Kitchen Pates Cat to the Future pouch 8% 235
Weruva Cats in the Kitchen Pates The Breakfast Cat pouch 9.7% 235
Weruva Classic Pates Meal of Fortune pouch 8% 236
Weruva Cats in the Kitchen Lamburgini can 8% 236
Weruva Cats in the Kitchen Double Dip can 8% 248
You want carbs under 10% and phosphorus ideally low 200's or less.
I hope this helps and she can find something on the canned food list