Serval body weight: 9-18 kg (20-40 lbs) Symptom dose of theobromine (house cat): 10 mg per 1 kg of body weight Lethal dose of theobromine (house cat): 100 mg per 1 kg of body weight (estimated range for Serval: 900-1800 mg) Estimated symptom dose range for Serval: 90-180 mg Estimated lethal dose range for Serval: 900-1800 mg Theobromine in milk chocolate: 57.4 mg per 28 g (1 oz.) Theobromine in dark chocolate 70-85%: 225 mg per 28 g (1 oz.) Chocolate Bar: 1.55 - 3.5 oz (44 g to 99 g) Theobromine per milk chocolate bar: ~89 - 201 mg Theobromine per dark chocolate bar: ~349 - 788 mg
The difference between human and domestic feline lethal doses relative to body mass is a factor of five. Whether or not an anthropomorphic Serval has a tolerance equivalent to a domestic cat's, something between a domestic cat's and a human's, or full human's, we can absolutely presume that Serval-chan has a body mass of greater than 9-18 kg, and probably something closer to 40kg, which makes her fairly safe so far as a single chocolate bar goes.
According to the wiki article, however, part of why dogs die from Theobromine poisoning is not just that they have less mass and a lower tolerance, but also process the chemical slower, so that theobromine can accumulate in the body between snacks on an overturned candybar.
Incidentally, hypercarnivorous cats cannot taste sweetness and do not crave sugar, so they rarely eat chocolates because they generally don't even like the (to them, quite bitter and plant-y) taste of chocolate. (That said, most wild cats have at least some omnivorous tendencies, and only domestic cats are hypercarnivores, while dogs are omnivorous, and therefore taste and enjoy sugar.)
Mettan said:
Of course, that's the numbers for ordinary animals, not the human-like Friends.
Of course, thinking about that logical inconsistency would ruin the picture, so don't do that. Or do. Your choice.
I always find thinking more is more fun and thinking less is less fun, so...
Incidentally, hypercarnivorous cats cannot taste sweetness and do not crave sugar, so they rarely eat chocolates because they generally don't even like the (to them, quite bitter and plant-y) taste of chocolate. (That said, most wild cats have at least some omnivorous tendencies, and only domestic cats are hypercarnivores, while dogs are omnivorous, and therefore taste and enjoy sugar.)
I always find thinking more is more fun and thinking less is less fun, so...
Now that's of course horseshit, because the Friends are humans with animal characteristics, which is why they can eat normal human food as shown in the animé.