This article is for humans but you get the idea.
https://www.livestrong.com/article/153409-what-are-the-most-toxic-vitamins/ excerpt below
Vitamin A
Toxicity in vitamin A is known as hypervitaminosis A. Symptoms of vitamin A toxicity are mild headaches, nausea, hair loss and blurred vision. Major adverse effects of vitamin A toxicity include birth defects, liver abnormalities, reduced bone mineral density, and central nervous system disorders, according to the NIH. The UL for adults is 3,000 micrograms of vitamin A daily. The recommended daily intake, however, is just 700 micrograms for women and 900 micrograms for men.
Vitamin D
Excess vitamin D accumulates in the liver and can cause bone calcification, headaches, weakness, nausea, vomiting, constipation, kidney stones and frequent thirst and urination. Severe symptoms range from kidney damage and bone weakness to growth retardation in infants and children. The UL for vitamin D is 100 micrograms per day, and you need just 20 micrograms daily to maintain your health.
