I don't think so and my sows have eaten quite a lot of plastic so far...
Moreover, the plastic house cannot be eaten so easily; they can nibble some little part... but the plastic is hard.
I had (and still have) some problem with a tunnel made of a plastic net. It is their favourite tunnel, they have grown inside it and I cannot throw it away although it has now a large fire exit and a lot of piece are missing!
this is how it looked like last March
also their plastic box used as a house has some hole...