I can’t remember, but have you already covered the any allergies the different monsters species might have? It could be food allergies or seasonal.
I've only gone in depth about Caffeine and the monster men species, but I would be happy to expand upon some allergies the various monster species have due to species restrictions!
Caffeine Link:
I remember that you said that caffeine works differently on different monsters. What are those effects? Warnings; different HAE AU species o
Canine species have severe allergies to Chocolate, Caffeine, Grapes, Onions (of all kinds, including shallots as well), cherries, and overly salty foods.
Jack in particular despises the smell of onions and will even cover his sensitive nose so he doesn't have to smell them. Grapes (and raisins) make Jack start dry heaving and will even cause him to become extremely ill if he accidentally ingests one, same with cherries. Jack doesn't like overly salty things and has issues with salt-water as a result. The taste is unappealing and he doesn't like how thirsty salty things make him.
Ruggie does GREAT with caffeine despite how hard he will crash when he has caffeine. Ruggie is also able to consume almost anything without negative effects other than hair and horns. Grapes are not great for Gnolls, but they can still eat them if starving. Ruggie doesn't love the smell of onions and they somewhat upset his stomach, but he can still eat some if he needs to. He would rather not have to eat things he isn't overly fond of, but a starving Gnoll will eat whatever they can find.
Sebek loves caffeine but has a hard crash when he ingests it. It gives him zoomies and he will be hyped until the moment he crashes, to which he will sleep for an extended period of time. Unlike the other canine species, Sebek can withstand salt quiet well due to his Fae-Raiju heritage and doesn't have as extreme of an aversion to salts.
Harpies don't do well with caffeine, as it can make them enter a state of pure panic, though they can still somewhat ingest more caffeine than other species (like werewolves and centaurs). Onions and Garlic are not great for them, as they can cause anemia and even liver failure if ingested in large amounts. They also need to avoid certain fruit seeds, as they contain cyanide and can kill the Harpies in large amounts. Chocolate isn't great for them, nor is dairy or Alcohol, but they can still ingest them in small amounts.
Neige has a particular dislike for apples, having almost choked on one and now avoids apples as a rule of thumb due to his past experience.
Crowley LOVES alcohol, though it isn't great for Harpies. As a Fae Harpy, Crowley has a greater resistance to alcohol and it doesn't affect him as much as it would impact non-Fae Harpies.
Vil has a strong dislike for Fatty foods. He is more partial to sweet foods and nectar due to his Hummingbird heritage, but heavily fatty foods nearly choke Vil when he ingests them and he becomes rather bloated if he ingests too much.
Most feline species share allergens and have similar foods that they avoid when it comes to what they ingest, of course, they all have different levels of how much they can ingest based on age and size. Caffeine isn't great for them, but they can still ingest more than the canine species or Avian species. Onions (as well as leeks, chives, shallots, and garlic) are not great for the feline species and can lead to anemia due to the potential damage onions (and other onion-like plants) can cause on their red blood-cells. Citrus can cause intense gastrointestinal upset in feline species.
Che'nya LOVES caffeine and has built up quite a tolerance to it due to it being so prevalent in the Queendom of Roses. He will often eat coffee beans when he can find them.
Trein loves his tea and will continue to drink it even if the caffeine in it isn't great for him. He also has a fondness for onions, so he will occasionally eat them when he is craving them.
Leona won't eat any vegetables or fruit unless the Human asks him, and he isn't particularly interested in caffeine, so he leans far more into a carnivore only diet.
Jasper likes citrus despite the fact that it sometimes upsets his stomach. He knows his limits, but loves the sharp tang of citrus fruits.
Grim is immune to most ailments caused by food. He can ingest all foods most feline species cannot and can even ingest rocks and tree-bark to fill up his stomach. If he had a choice, he would rather a meat heavy diet that includes large amounts of fish.
Most of the Ungulate species (excepting Kelpies) are unable to eat large amounts of meat. It doesn't process well in their stomachs and can result in bloat as well as death if too much is consumed. They can eat meat in smaller amounts, but large amounts of meat does not do well for the ungulate species. Fruits with pits are also not great for the Ungulate species, as many of the pits in fruit contain toxins they cannot digest.
Alistair doesn't like heavy meats, more partial to lighter meats like chicken when he does choose to partake. He also is fond of white-fish because they are not too heavy on his stomach.
Riddle is partial to Caffeine in small doses, such as teas, but he does not like coffee as it is too strong for him. He also is more leaning towards white-fish and white-meats over red-meat.
Ace and Deuce can eat almost anything, but Garlic and Onions can cause gastrointestinal upset and can even result in illness. Ace is well known for eating EVERYTHING, so he has to visit Crewel quite often to have his stomach pumped because he ate something he wasn't supposed to. Deuce is better about avoiding foods that are bad for him, but he does love to consume eggs on the regular and will occasionally get Salmonella from eating raw eggs.
Silver does not like meats of any kind. He can eat meats, but he is far more on the scale of herbivore than others and will avoid eating meats if he can. He is more partial to fruits and veggies, even to tree-bark in a pinch. He will eat meat if offered by Malleus, The Human, or Lilia, but he is not overly fond of meats.
Vargas has a much more omnivorous diet compared to the other ungulates and will eat meats if offered. He has an extreme sensitivity to corn and will avoid it as it doesn't digest well in his stomach compared to other vegetables.
Nymphs vary in foods that they can and cannot consume. Most foods are safe for Nymphs to eat depending on their various elements. There is no one item that is considered deadly among all nymphs as the elements they are changes what is overly safe for them to consume.
Fire Nymphs are unable to consume anything too juicy or full of liquid. Grapes are the juiciest thing that a fire Nymph can consume. Too much liquid and the Fire Nymph risks harming their cores and potentially smothering their cores. Drier foods and salt cured foods are better for Flame Nymphs. Wood is also an acceptable food that they can consume as it is more fuel for their fires. Rollo is particularly fond of grapes.
Water Nymphs can consume things that are not too drying, so they tend to avoid dried or cured foods. Juicy foods such as watermelon, Oranges, and other liquid filled foods are best for water Nymphs. Cater in particular is a fresh-water Lake Nymph, so he doesn't do well with salts, but salt-water Nymphs are able to endure large amounts of salt in their diets and in their water.
Plant Nymphs are fairly capable of consuming most things, from rotting food, to plants that are heavy in cyanide, there is little that cannot be consumed by a plant nymph. Pure toxins and pesticides can cause damage to them which can impact what they can consume, but is not that large of a risk for them.
Air Nymphs are more partial to lighter foods, less meats and dense meals. There is not much an Air Nymph cannot consume, but they are often able to consume most foods around them. Kida in particular is more fond of plants such as mint, peppermint, and other herbs. He is not overly fond of meat.
Genies are technically Magic Nymphs and they do not need to eat any foods to sustain themselves as they subsist off of residual magic other species let off. Kalim has a fondness for eating and drinking anything he can, as he simply enjoys the sensation and act of eating.
Most Merfolk have varying foods that they can consume, primarily piscivores and frequently eat other fish given where they live. Most can eat foods that can be found in the ocean and will prefer those foods over what can be found on land. Many merfolk have sensitivities towards red-meats but it also depends on the species as well. Caffeine isn't always great for them to consume, but they still enjoy the foods that they have.
Jade and Floyd are able to eat red-meats easier than many other Merfolk as they have adjusted to life on land well. Jade is overly fond of mushrooms which most Merfolk cannot stand, making him unusual among Merfolk like himself. Floyd is primarily a carnivore and will go out of his way to try different meats over vegetables or fruits that he finds.
Azul is a caffeine FIEND and will go out of his way to find caffeine to consume, be it teas or coffee. Azul is not overly fond of red-meats and is more partial to poultry than he is to the red-meats Floyd drags back to Octavinelle with him.
Driders cannot STAND peppermint, garlic, lavender, and citrus. The scents often drive them away and can cause gastrointestinal issues if consumed or put into their meals. Most Driders are carnivore and insectivores.
Rook will tolerate small doses of Lavender, Citrus, and Peppermint as Vil is partial to these smells, but in large amounts they will make him physically ill if he is around them. Garlic is akin to poison to Rook and he will do all he can to avoid garlic or garlicy foods that he is presented with. He will willingly consume garlic if it was put into a meal by the Human despite the fact it will make him violently ill. He will continue to eat this garlic infused food so long as it is the Human who offers it to him. He finds nothing more beautiful than consuming the food that was made for him even if it is heavily laced with poison. He is a simp first and foremost.
Bat Fae- and even regular Bat species- are not big into eating fatty meats, but otherwise do not have many foods that they cannot consume. Vampire Bats in particular just need to ensure that they consume blood from other species so they can obtain certain vitamins that their bodies cannot synthesize from the other foods they consume.
Lilia in particular is picky based on texture and less on the contents of their foods. Fluffy foods (like marshmallows) are detestable to Lilia, where he prefers more chewy foods over flaky or intensely squishy foods. Lilia is more fond of foods that are red in coloration as they remind him of blood. He is also very big into caffeine and alcohols as they soothe him and almost pacify him when he consumes them.
Dragons do not have any particular food sensitivities. Preference for foods is based off of the personal tastes of the Dragon themselves.
Malleus likes cold and sweet treats. Frozen fruits, frozen drinks, things of that nature. He is less partial to large meals as he rarely has anyone to actually share those meals with. This is- in part- why he adores what the Human cooks because it draws in others so he is able to have meals with a group instead of by himself like he is often relegated to doing.
Teumessian Foxes do not do well with caffeine, chocolate, or Grapes/raisins. Caffeine can easily overwork their hearts and make them collapse if they ingest too much. They also struggle to digest chocolate as their bodies cannot properly process chocolates. Most Teumessian Foxes are omnivores, leaning closer to carnivores.
Robin has a particular preference for lean meats; rabbit, poultry, fish. Robin will partake in caffeine if available, but he walks a fine line between consuming too much and consuming a safe amount.
Shinigami don't need to eat as much or as often as most of the other species. A lot of Shinigami don't really eat foods beyond the sparse and dry foods that can be found in Tartarus. The Shrouds are unique in that most of them have adjusted to a calorie heavy diet due to the abundant food that can be found in Twisted Wonderland. Naturally, most Shinigami do not have this privilege as they live almost exclusively in Tartarus.
Idia likes snacky food but rarely finishes any meals he has. He will pick at his food and eat what he is given, but he leans more towards liquids and fruit juices over heavy meals.
Ortho has a few more sensitivities than other Shinigami due to the many injuries he sustained while being mauled by his Feral ancestor. Smaller foods, steamed veggies, and lighter meats are better for Ortho as they don't bloat his stomach or put pressure against his damaged organs. He has an artificial lung, half of his small intestine is artificial, and his stomach is smaller due to losing a portion of it during the attack. He has more frequent meals than his brother, but they are lesser in size so his body can properly digest the foods he eats.
