This is sure the aspect to go for. Connecting farmers to barn farms is a viable, though always a little risky strategy. Entering pig, you basically double the award for this approach, making it really powerful.
However, I also agree with Paul, if you can place a farmer early on a potential "barn farm", then have the option of placing your pig, you might take the risk of not getting it back for later connecting farmers. But even then, I would rather try to either place my barn there or score another barn farm with it. The difference is, that here the pig gives you only a +25% boost, instead of +50% later on.