The reason dog food is a no for cats isn’t because it’s harmful if they eat a kibble or two, but because dog food isn’t fortified with an amino acid cats need, taurine, so feeding a cat exclusively on dog food will result in a type of malnutrition in the cat.
https://www.petmd.com/blogs/nutritionnuggets/cat/dr-coates/2014/december/what-taurine-32287
Does it turn into a gryphon when it grows up?
And would the fiber from its cocoon be considered fur or silk?