Fat 7%... that's a no-no!
Same with the protein, much too high.
Unless supplemented with daily foods that are low in protein to bring down the daily %.
Seed mix is very bad for rats, usually lacks calcium.
Stashing blocks is not a bad thing, it's their natural instinct and puts them to work. Stashing is usually kept for the good stuff, not yummy stuff but the good stuff that will keep for the winter, know what I mean? Think of it like a squirrel, give the squirrel acorns and he'll go stash them, give him a peanut butter cookie and he'll probably eat it on the spot. Mine does anyway. lol