Yes it is a good point regarding sprayed Vs non sprayed Christmas trees...... My understanding is that many are sprayed with a latex spray to help the needles stay on longer after cutting. The needles on the sprayed ones are shinier (better consumer appeal no doubt!). I'm not clear if this is natural or synthetic latex but either way is regarded as non toxic....... I found the goats were self selecting and ignored the sprayed ones for several weeks until they had been rained on a few times and lost their shine then they gobbled them up.