Parrot took sudden dislike to husband

by Deb Love
(Cleveland. UK)

Thankyou for replies to my question about parrots talking . I now have another question one of my baby blue fronted amazon took a sudden dislike to my husband this happened literally overnight. I have had them for 4 weeks now and no they are not related. I don't know what the sex of either of them are. My husband strokes both of them every morning but now for no apparent reason one has started biting him yet the other is quite happy to fly to him and enjoys being sat with him.