I cant remember where i read it. I have 12 cats and i know it might sound sad but i read up on everthing about them. I just know its not good for them its the only other thing i would not let them eat is onions. for the same reasons
Just found this
Foods That Cats Should Not Eat - Dangers, Potential Health Risks
Chocolate - Adverse symptoms include irregular heart beat, dieresis, diarrhea, lethargy, vomiting, muscle tremors, potential death.
Onions (cooked or uncooked) - Giving onions to your cat, even in tiny amounts above their toxic level can cause anemia via destruction of red blood cells. Adverse symptoms include blood in urine, lethargy, decreased appetite, rapid heart beat, depression, pale mucous membranes.
Garlic (cooked or uncooked) - Giving garlic to your cat, even in tiny amounts above their toxic level can cause anemia via destruction of red blood cells. Adverse symptoms include blood in urine, lethargy, decreased appetite, rapid heart beat, depression, pale mucous membranes.
Leeks - May cause anemia. Adverse symptoms include blood in urine, lethargy, decreased appetite, rapid heart beat, depression, pale mucous membranes.
Squid - Adverse symptoms include
Raw Pork - Due to toxoplasmosis risks which can be transferred to humans when cleaning kitty's liter box.
Dairy Products - Adverse symptoms include loose bowels, diarrhea. As a note, there are specially formulated varieties of milk for cats and kittens that can be found at most pet stores and shops.
Salt, in excess - Adverse symptoms include
Supplements & Over the Counter Medications - Always acquire vet's approval before giving your cat any over-the-counter supplement or medication - including medications and/or vitamins intended for humans.
Tuna, canned - Consult vet due to mercury content dangers. Is your kitty a Tuna Addict? Cats can become easily addicted to tuna which is unable to meet their daily nutritional needs. Too much tuna also sets the stage for steatis, commonly called Yellow Fat Disease. Adverse symptoms include anorexia, fever, lethargy, abdominal pain, chest pain, hard lumps which are painful.
Dog Food - May create a metabolic imbalance.
Bones - Presents a choking hazard as well as internal organ damage as bones splinter easily, particularly cooked bones. Signs of choking include gasping, blue gums, face pawing, drooling, breathing difficulties and loss of consciousness.
Egg, raw - Potential risk for biotin depletion. Symptoms include hair loss, dermatitis and growth retardation.
Fish, raw - Potential risk for thiamin deficiency. Symptoms include weight loss, weakness, uncoordinated rapport.
Liver, in excess - Large supply of Vitamin A contained in liver may lead to Vitamin A toxicity. Symptoms include osteoporosis, deformed bones, bone growth/development issues.
I do feed all my cats tuna but only in moderation. With the curry its the ingredients that it might include like onion and garlic