No. The pet food for the monkey, hawk, brave dragon, power tiger, molly, and mock duck were cheaper than the organic. They have no difference in leveling the pet faster. 1 Feed every 30 minutes = 2 Feeds every hour. The benefit of the pet specific pet food was a stack of 20 would last 20 hours, and most of the time a person might only have one or two pets in their inventory. So the pet specific pet food is convenient for grinding and not returning to buy more. Need twice as much space with organic compared to pet specific food because of 10 hours vs 20 hours. The pet specific foods excluding the ones for fusion pets and Fire Fox were 8,000 crones and then the tax which is usually at 10%.
The fusion pets and fire fox pet foods did cost a lot more and organic pet food is cheaper for them but then again, there's convenience. Some people do want to spend the extra crones on the pet specific foods for convenience.