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Potentially Unsafe Herbs for Pets
Not all herbs are safe - this page is about some unsafe herbs that are not suitable for use in treating our pets.
Some people mistakenly believe that because herbs are “natural”, as such they are “safe". The bad news is, that is not true. Like any other therapeutical substances, certain herbs can cause side effects. Others can even be toxic or even lethal to some animals when used inappropriately. Sometimes an herb can cause side effects by itself; other times the use of an herb might interfere with the actions of a conventional drug or increase the chance of side effects when used in conjunction with certain drugs. However, having said that, herbs are generally less likely to cause the type of nasty side effects caused by conventional medications. The bottom line is, when you are unsure whether a certain herb is safe for your pet, consult a holistic vet first - especially if your pet is on conventional medications, or is already weakened by certain ailment(s). Unsafe Herbs for PetsThe following herbs are potentially dangerous for use in animals and care should be exercised when using them:
While this herb (and its essential oil) is an effective insecticide, it is very toxic to dogs and cats. Do not use pennyroyal to treat any animals. Undiluted tea tree essential oil is VERY toxic to cats and small dogs. Always dilute the oil (at least 50:50) in a carrier oil (e.g. olive or almond oil). Test a small patch of skin prior to use as some pets may be sensitive to the oil. Comfrey contains small quantities of alkaloids that can cause liver damage or cancer if taken in large quantities. White willow bark contains salicylates which may be toxic to cats. This Chinese herb is most commonly prescribed for pets with asthma or respiratory problems. However, it can cause heart arrhythmias (irregular heartbeat) and high blood pressure in animals, and some reports also state that it may cause idiosyncratic reactions in cats. Use with great caution in all pets. Wormwood is a traditional deworming herb. It is however too strong on pets. There are other safer natural remedies for deworming and wormwood should only be used with extreme caution under strict holistic veterinarian advice. Garlic in large amounts can cause Heinz body anemia in dogs and cats. It is not advisable therefore to use garlic in pets with anemia. However, if fed in small amount, garlic is good for many uses, including the treatment of parasites such as fleas and worms, microbial infections, and in the treatment of cancer. One clove of garlic per 10 pounds of body weight for dogs (and 1/2 clove per cat) can usually be fed safely each day. Possible Side-Effects of Herbs on PetsDifferent animals may react differently to the same herb. For example, certain herbs may cause slight allergic reaction in some pets, while other pets are unaffected. Some possible side-effects are:
Interference with Conventional MedicinesCertain herbs may interfere with conventional medicines and therefore, as a general rule, consult a holistic vet before using herbal treatments if your pet is on the following medications:
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