Recently we had a short discussion about feeding thistle and if chinchillas can deal with thorns of thistles. There is in fact an interesting behaviour already reported in earlier discussions that chinchillas nibble off all the thorns of the thistles. So it is a good advice to offer them the thistles as they occupies the chinchillas and enrich their behaviour.
In addition we have to know that chinchillas also have to deal with thorns in their natural habitat. They inhabit the so called thorn scrub savannah or also known as Matorral and many plants in their habitat, even fodder plants have thorns, e.g. Puya, Porlieria, Berberis, Acacia, Opuntia, Echinopsis and so on.
The whole discussion in German is located here:
viewtopic.php?f=12&t=3900Abstract in German / Kurzübersetzung:
Ich habe in diesem Beitrag kurz die Beobachtungen zusammengefasst, dass Chinchillas die Stacheln von Disteln abnagen und dass sie auch in ihrem Lebensraum in der Wildnis mit vielen Pflanzen umgehen müssen, die Stacheln tragen und dass sie die Dornstrauchsavanne bewohnen. Für mehr Details empfehle ich den Original-Thread zu konsultieren:
viewtopic.php?f=12&t=3900