They don't want them to "contaminate" Scottish wildcats. They have recently abonded a breeding programme due to finding moggie genes in what they thought were pure Wildcats.
PDF is here if anyone is interested.
I haven't read it all as I have too much other stuff to look at but I can't understand how they can regard feral cats as alien but owned cats differently
- I will ask
www.ptes.org/files/908_sobm_2010.pdf