Some Natura products have tested high for potato toxins as posted in Itchmo.
The copy of the toxin reports are in the Florida lawsuit amended complaint exhibits - page 41 & page 42
http://docs.justia.com/cases/federal/district-courts/florida/flsdce/1:2007cv21221/295436/258/2.html innova evo ancestrial bites- chaconine 46.3ug/g solanine 43.3 ug/g
innova health bar baked treats dogs -chaconine 2.38 ug/g solanine 4.96 ug/g
innova evo no grain baked treats -chaconine 41.0 ug/g solanine 40.9 ug/g
innova evo no grain treats -chaconine 49.0 ug/g solanine 51.0 ug/g
california natural lamb & rice- chaconine 12.8 ug/g solanine 14.6 ug/g
The tests showed 4 out of five samples were also positive for feather fragments. One sample was positive for hair. You could see feathers in the kibble . These samples were from treats and dry food. You could also see hair sticking out.