PoisonVenom glands in snakes evolved from modified saliva glandesglands. The only glands present in the paw area are related to the emission of sweat or pheromonspheromones.
Probably itIt would be better for the claws to evolve to have a non smooth-smooth surface, that becomesis able of collecting dirtyto collect dirt and remains of other prey, acting. This surface would act as a growing ground for toxic bacteria.
In this way, if the hurtedinjured prey manages to escape, septicemy will kill it will die from sepsis soon. Or, or at least, will make it weak enough for the cat to catch it.