It is probably the stress of the change of home but it is advisable to have her checked out at the vets. I presume she won't have had her first innoculations yet either. It is possible she does need worming again.

You could take her off her kitten food for 24/36 hours and just feed her cooked white fish with/without a little boiled rice and then gradually reintroduce her kitten food.

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Kaz

For kittens, joy is for the asking and smiles are for the giving