i picked up a persian kitten about 6 months ago, and since the day we got her she literally has not stopped purring. she purrs when shes sleeping, when shes playing, when shes eating, when were brushing her (and i know she is NEVER thrilled about seeing the brush). is there something wrong with her? or is she just an extremly happy kitten? is this a common thing for persians? im just curious because ive had other cats before, and none of them have ever purred 24/7 like this one.