Royal Canin Renal Diet was the option we have actually. It only came in one big bag which would last Snuz about a month to consume. For Php850, it's actually reasonable. Other pet supplies store are selling it for about Php100 more.
We started incorporating it into Snuz' food by mixing in broiled mashed chicken lungs. Since we made sure that the chicken lungs coated the dog food well, Snuz was forced to eat the dog food along with it. For the first couple of days, she wouldn't finish her meal. Only good side to it is that at least, she was still able to consume some of it. As for the pill, we make a chicken lung meatball of some sort and just insert the pill in the center. No problems with Snuz taking that in.
A week has passed and Snuz is consuming a full meal. I guess this old dog is still open to new tricks. Atta girl!