let us know how well that works, I considered something like that to stop free feeding the rats. nasty things, would a rat be heavy enough to open it?
I am not sure the actual weight required to open it but I suppose it could be adjusted if necessary. A rat would not be heavy enough to open this one, though. I showed my husband a picture of one and he was able to design this from the picture without any plans. He made me this strawberry planter last year the same way. I showed him a picture of a table top planter and he made this one for my strawberry plants.