Britain's oldest animal charity could evaporate within a decade, a confidential assessment of its future has warned.
The RSPCA has recently been rocked by a Charity Commission investigation following complaints about its "threatening" stance to farmers involved in the badger cull.
However, now a leaked document penned by deputy chairman Paul Draycott warns it is scaring away commercial partners and driving traditional supporters to write it out of their wills.
He says the charity's "more vocal" campaigning on issues like fox hunting and the badger cull have raised concerns.
"Some of us have become concerned at the lack of a coherent strategy to manage this change in increased campaigning visibility."
The memo, published in The Times, also says the pro-hunting movement is outmanoeuvring them and organisations like The Countryside Alliance are "far more effective at causing serious damage to our reputation that we are theirs."
The RSPCA's lawyers said that Mr Draycott had explained he used hyperbole in the note as a springboard for discussion in a confidential setting among colleagues.