I ask as my 5 month old kitten hardly ever wags her tall which I take to mean she's happy. However this morning we were having snuggles time and she moved into Her back to let me rub her tummy she was purring loudly (which I thought meant she was happy) but started waging Her tail, very slowly so it hit my arm and herself. Does that mean she was angry ? Strange as she was purring with her eyes shut !