Do you eat oatmeal at home? Save the boxes and the plastic lids. ( If you can find cardboard lids even better) On the sides of the box cut slits or little squares out, Peek holes. In the bottom of the box punch a small hole and thread thru hemp cord with wicked large knot or use a pony bead tied to the cord. Add treats, paper shred, corn husks that you boiled and dried, foot toys, whatever you want. Punch a hole in the top lid center thread cordage thru plastic lid another big knot and slip knot higher up for pear hook.
Most of those baffle cages are made overseas and who knows what is in those welds. We went oatmeal boxes when I was volunteering at the clinic.