This ferret didnt bite before which suggests something has upset him, there is a good chance IMO he will settle back down again.

Is he definatley not in pain? i once had a placid boy who turned savage, he had a tumour.

Is he neutered? although he shouldnt be in season now anyway so thats not likely to be the issue.

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Tiggy, 13 yr old Collie x Alsation, Lucy 11 yr old epileptic cross breed, Kara, collie x whippet