What is the best eco-friendly
wood treatment to preserve solid wood in an indoor cage? It's really for guinea pigs and not for rabbits, but since the cage materials and treatment are exactly the same for both animals I'm just posting here.
There will be rubber mats on the wooden bottom (+ bedding) so it's not like they will piss and poop directly onto the wood. It's just all the little corners and cracks that are still exposed, because we won't be able to seal it 100% with rubber mats. Also the wooden sides of the cage will be exposed.
I know that linseed oil and walnut oil are types of wood preservatives, but I have no idea if they would be suitable for this type of application. My concern is whether it's strong enough to handle something like animal urine - it's not just about waterproofing it but also about protecting it to ammonia (as much as feasible anyway).
Any recommendations? I know you can buy stuff for these purposes in DIY stores that is classed as water-based, solvent-free and eco-friendly, but I have a suspicion most of the time it's not really that natural or still contains some undesirable chemicals.
Thanks!