I've been researching this subject lately also.
I'm not fond of animals trying to make their way into the vestibule, tent, backpack, chewing a hole through any of these, damaging them, and /or stealing my food on a hike.
Here's what I came up with so far:
* ODOUR PROOF BAGS (also known as Odour prevention bags)
These work by containing the smell which attracts the animals / rodents.
One of the main ones is OPSAK (which stands for Odour Proof SAK):
https://www.amazon.com/LOKSAK-Opsak-Bar ... 00UTK957K/Another brand is BaseCamp Odor Barrier bags:
https://www.amazon.com/BaseCamp-F232335 ... 00H1KJ1T8/* STAINLESS STEEL MESH BAGS
These are made of industrial stainless steel (wire) mesh. Rodents struggle to chew through it. Brands include Outsack, Grubpack etc.
Grubpack:
http://grubpack.com/epages/361c88ff-2d1 ... Products/C or through Amazon:
https://www.amazon.com/gp/offer-listing/B01ATT9IEK/Ratsack:
https://www.amazon.com/RATSACK-Ratsack- ... s=Grubpack* BLENDED KEVLAR FIBRE & STAINLESS STEEL MESH
There's another kind which is made of Kevlar “bullet proof” fibre and stainless steel, called the Ursack Minor Critter bag.
Ursack Minor Critter bag:
https://www.amazon.com/Ursack-Minor/dp/B01ETZU7D6/I was also smiling at one writer described as his "trifecta turducken of food protection"; using an odour free bag - in a dry sack - in a rodent resistant bag. (This way achieving 3 layers of protection). Source:
https://thetrek.co/appalachian-trail/ke ... e-rodents/You bear bag hang from a tree to keep it off the ground, but of course a lot of rodents are good at shimmying along branches and down lines so it's not 100%. But if combined with other methods, it may be adding another layer of difficulty for animals to get at it. Or at least particular types of animals.
* BEAR CANISTER
Some of the popular brands of bear canisters in the USA are:
Bear Vault BV500 (larger size) or BV450 (medium size):
https://www.amazon.com/Bearvault-BV450- ... 001V9HENU/There's another kind which has the top as a fry pan, which is kind of a cool idea to my mind:
https://www.amazon.com/Lighter1-Lil-Sam ... 00FM23RPG/and the larger size "big daddy" is here:
https://www.amazon.com/Lighter1-Big-Dad ... 00FN381NW/Hope this helps!
I haven't personally tried any of the above methods yet, but I am looking at doing so on future trips so I will look at posting an update when I've got enough experiments done that I actually feel like I can anecdotally report on the success of the method tried.
Best,
Emma