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Message: <blockquote data-quote="King Edward" data-source="post: 3162026" data-attributes="member: 80872">It probably depends on how low the Grey Squirrel population drops. Below a certain threshold there may not be enough of a disease reservoir to stop the Reds recolonising - some individuals would get infected and die, but not enough to wipe out the whole population. Sustained low-level, occasional contact between Reds & Greys would also seem the best conditions for the evolution of resistance in Reds.The main problem with culling for eradication is the diminishing return for effort as the population drops. If you need to trap then kill, then for each squirrel caught you're going to have to spend an awful long time checking empty traps (or traps with Reds in them). With Mink, at least you can use the rafts to monitor presence/absence without the commitment of needing to check traps regularly.</blockquote>