Bouncing is when a cat will drop into low numbers and the liver responds by releasing hormones to help the cat stay safe. It is like a built in mechanism in cats. if the cat has been diabetic and untreated for a good amount of time, the liver thinks that the high numbers are normal. So when you give insulin,and the numbers start to come down, the liver panicks and doesnt recognize the lower numbers as normal and responds. Some cats bounce alot, like mine, she will bounce from numbers in the 100s. Sometimes cats just stop bouncing and continue to drop and and insulin is reduced accordingly. That is what we wish for! All cats are different in how or when they bounce, they just do until they dont.. confused_cat . I think Calley might be dropping low at night and the liver panicks and she soars high for the next cycle, and this could be happening alot. without pm #s, its just a guess.