Turns out, fruit tree fertiliser contains blood and bone, so labradors will clear fences to get to it.
Who knew, right?
PS. After the labradors have been dealt to by the veterinarian, they'll follow their owner with those weepy "Oh my god can you please feed me, I am SO hungry!"-eyes and the master be, like, you have got to be kidding me, dog.
PPS. This certain labrador is even willing to ruffle through peastraw to get to the fertiliser. I wonder if there's a way for me to convince her to ruffle for weeds the same way, in the peastraw, so I don't have to? *scheming