More durable fence ideas?

[tivia]

Hi all,

I'd like some ideas on how to upgrade/replace my fence around my little garden such that it is more durable/rot resistant. . .

The pictures below show the fence around my garden; it's approximately 11x12 feet, and is built up to compensate for the slope in our yard.

There are two in-ground beds on either side; I use the center section to plant in 5 gallon pots.

The issue is that some of the posts that are driven into the ground have rotted all the way through (if you can see this at the soil line in the third picture)

Bonus points for suggesting a type of fencing that is capable of keeping out squirrels/baby bunnies/kittens (yes, I had all three in there last season!)

Some of you have such beautiful garden set-ups that I'm sure you might have some ideas for me!

Thanks in advance
Marie