1. Life Changes - Any changes, whether it is a new bowl or litter box, a new home, any new environment, or the introduction of a new family member, can lead to clinginess.
Hunger
A hungry cat is a clingy cat. I have a first hand example; my cat glues himself to me when it’s time to eat.
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3. Playfulness
If your cat is not clingy all the time, but has sudden changes in its behavior and becomes weirdly attention-seeking, maybe it’s just playtime.
Anxiety is highly present in cats, and especially in rescue cats.