The International Society of Feline Medicine (ISFM) guidelines go even farther than the AAHA guidelines. The AAHA guidelines read they like really wanted to say use glargine but also didn't want to offend the caninsulin diehards.
From the
ISFM guidelines:
On the front page: "Optimising bodyweight, feeding an appropriate diet and using a longer acting insulin preparation (eg, protamine zinc insulin, insulin glargine or insulin detemir) are all factors that are likely to result in improved glycaemic control in the majority of cats. There is also some evidence that improved glycaemic control and reversal of glucose toxicity may promote the chances of diabetic remission."
Page 239, in massive letters: "The use of longer-acting insulin preparations, injected twice daily, is recommended for optimal diabetic control."
Page 240: "the Panel recommends, whenever possible, the use of longer acting insulin preparations (eg, glargine, detemir or PZi), injected twice daily, for optimal diabetic control"