We recently purchased some acreage of which approximately 1.5 - 2 acres is old overgrown pasture now covered in dogbane. We were thinking that we could make a decent sized pig tractor and allow weaner pigs to till the soil for us and make that section useable again. However, I have read that dogbane is toxic to cattle, horses, etc. Can anyone tell us if this will work with pigs? We don't want to use pesticides but I'm concerned about the toxicity of the dogbane.
If we hack down the weeds, will the roots that the pigs have access to still be toxic or is it just the plant?
I find that our pigs don't eat the toxic things, rather they trample those plants down. Toxic things tend to taste bad. Think of it as a form of inter species communications. We used to have a lot of dogsbane but I rarely see it now. The pigs done a wonderful job of helping to renovate what were abandoned pastures, some of which had grown up to forest. We recut low to the ground and back to the old stone walls to reopen the pastures. We've done this twice to gradually expand our fields. See: