Dye can be absorbed through your pet’s skin and make it sick. Your pet can potentially lick the dye and that could harm it.
Some non-organic food dye (Blue 1, Citrus Red 2) have been linked to adverse effects in animals including allergic reactions and tumors. Always talk to your vet before using anything on your pet. [3] X Research source
Dye foods include asparagus, beets, sweet potatoes, strawberries, spinach, cranberries, and carrots. [4] X Research source
Do not use anything that will cause your pet pain. This includes acids or bleaches.
Try mixing the dye and water into a spray bottle. This will make it easier to apply it to your pet.
For trickier colors to obtain (like blues and purples), try adding the mashed food mixture to baking soda to make a paste. Start with ¼ of a cup of baking soda and add it to your food mixture until desired amount/color is achieved.
Dampen your pet’s fur with a spray bottle of water. You do not want to soak the fur, but spray so the fur is damp to the touch. Apply the chalk directly to the damp fur. If you want a lighter color, use less chalk. If you want more or darker color, apply more chalk. Wait for the fur to dry. This will help the color set into the fur. Use a blow dryer (not too hot, try a medium setting) and blow warm air over the chalked fur. This will help the color set and last longer.
Apply dye mixture in small areas. Start with an inconspicuous area to test the color. This will also help determine how the she will react to being dyed. Avoid spraying dye into her eyes, mouth, or nose. This could harm the animal and/or agitate it. Apply one color at a time. It is recommended to let one color dry before applying any more near or on top of it. This will stop color from running or mixing together.
If this occurs, take her to the vet immediately.