You can get birdseed (I just use the wild birdseed mix, you can make bigger batches for cheaper, and its the same stuff.) and mix 1 packet of unflavored gelatin (Prepare the gelatin first) to 2 cups of birdseed, and let it chill until its clumpy. Then you can shape it into molds, or little balls, and put it in the fridge or freezer to finish solidifying. Finished product needs to be stored in the fridge though, but its good in the freezer for much longer.
NOTE: This recipe is best if you plan to use it quickly. do NOT make it in large batches, unless you have a flock of birds!
Thats what I use for wild bird feeders, and occasionally Ill give millie a block.
But here are a few recipies I found on Pinterest too!
Recipe 1 See it on pintrest
Recipe 2 See it on pinterest
Hope this helps ya! Ive tried out the second recipe, and it works amazing! Im going to try it with something other than dates though, Like apricots or plums and see if that works too!