At this time of year, hundreds of farmers post pictures of cute lambs on their instagram, for likes and follows. They don't mention, obviously, that those lambs will shortly be sent for slaughter.
Vegan activists also use cute pictures of lambs etc., in order to make people go vegan.
With a few choice comments from vegans, these farmers' posts can become vegan posts, and make people think twice about what they are eating. Lambs are the ideal animal for turning people vegan, because they are so obviously cute, and so obviously babies.
So thanks, farmers, for posting all the cute lamb pictures - you are doing the vegan activism for us by showing what beautiful creatures lambs are, and we'll just add a few comments reminding people that if they love lambs they should stop eating them and go vegan.