A pine marten ( nasty vicious little critter) got in to my daughter's chicken coop in Canada. Needless to say the Marten enjoyed it a lot more than the chickens! Only one chook survived. RIP Rooster Joe and 5 of his girls. My daughter is most miffed at having to buy supermarket eggs again!
Over there the Pine Marten's are not an endangered species (unlike the chickens) so the next door neighbour managed to trap and despatch it!
A new flock is being established and the coop has been marten and fox proofed. There's nothing they can do about the bears - but then again Chicken doesn't seem to feature in a bears diet!
Back in the day (80s) when I was more or less resident at White Dykes outside Kyle, a pine marten was a regular there. He was quick. Leaving food out was not a good plan.
Along the coast at Reraig, the woods are up above on the hill but down by the shore the Higgs had rat problems in their MoD-owned house. One night the rat noise was very excessive and then all went quiet. A pine marten was seen sitting on top of the post of the front gate (right beside the trunk road) at about ten in the morning licking blood off its paws. The rats were never seen or heard of again.
If you are a human, they appear very shy but if you are a rat, apparently not.