to Purrs.
Its pretty interesting that. I have to admit none of mine in the past ever did that, especially so young, but cats are consistent in that, if there is a change in their life or their home they will react by demonstrating different behaviour. Sometimes weather changes affect them, often times it could be another cat in their territory that they now want to watch, or it could be illness of some kind.
If Dayzie is eating and drinking normally but her relationship with you is the only difference you see, I'd ask if there have been changes in the home?
There are no doubt going to be a few more posts with way better suggestions than mine, but food for thought none the less.
If you have some photos of Dayzie we would love to see them