2 cat household with different dietary needs help.

Question
My question relates to feeding, first a bit of background on the 2 cats. My wife and I have 2 cats both aprox 6 1/2 years old and 15 pounds each one is a short hair one is a long hair. There feeding has always been to put 2 cups off food out in the morning (1 cup for each off them) and let them snack all day. The Short hair was just diagnosed with kidney disease . Our vet put him on a low protein diet. The vet said it was ok for the other cat to go on it to. I gradually switched the food over the course off a week. On the fifth day our long hair cat would try to use the litter box about 10 times in 1/2 hour. The long hair went to the vet and had some tests run he has a urinary tract infection and struvite crystals so he was put on a low PH food. Now for the big problem we can not get our cats to switch over to feedings of 2 times a day. they will eat almost none off there food and after 3 days of this both cats were very week. I had to put the low protein food back down as before so they would at least get some food. Now the long hair is having trouble urinating again after one day of the old food he can go but he does not urinate very much. I am at a loss what can I do? I have to feed the one cat a low protein diet for its kidneys but the long hair can not eat the low protein food because it sends his PH level up. Is there an all in one food that is low protein and low PH? If I can not get this sorted out I fear I might have to find another home for one off the cats for its own health.  

Answer
One option is giving the cat with urinary tract problems a supplement called METHIOFORM/METHIGEL to reduce the pH of the urine and then feed both the low protein diet.

The other option is feeding an all natural SENIOR Cat Food, which is usually reduced protein compared to regular adult foods--you will have to compare food labels and brands.   For example, Hill's K/D for kidney disease has a protein level of 24% so you want to look for a cat food a protein level around there.

I have switched some cats from prescription UR or c/d food for urinary tract problems to Eagle Pack, which has a target pH of 6.0 so that would be one food to check the label for protein levels in the senior variety.

Also, Flint River Ranch is a great food.
www.naturespet.com/flintcf.html

AND FEEDING CANNED FOOD WOULD BE MOST BENEFICIAL TO BOTH CATS!   The more water they drink and the more moisture in their diets, the better.