Orange and lemon peels (cats dislike citrus smells), cayenne pepper, coffee grounds, pipe tobacco, lavender oil, lemon grass oil, citronella oil, peppermint oil, eucalyptus oil, & mustard oil.
As a general rule, cats are sensitive when it comes to smells, but there are a few scents they hate that might just surprise you. They can't stand citrus and as much as you might love the smell of fresh herbs, cats hate rosemary and thyme. Banana and mustard are a big no-no too, as well as lavender and eucalyptus.
Vinegar as a cat repellent
Spraying Outdoors – Straight or diluted vinegar can be sprayed around the edges of a garden, and on plants, fences, posts and garden décor to keep cats away. Concentrate the spray on areas that the cats frequent or that you particularly want to protect.
Mix together lemon juice, rosemary and white vinegar - three things cats detest. Put the liquid in a spray bottle so it's easy to use around the garden. Simply spray near where the cats spend time - on planters, the patio, or even inside.
Likewise, geranium and eucalyptus plants give off an odor that cats dislike. Keep in mind that lavender, geranium, and eucalyptus are all somewhat toxic to cats; if ingested, they can cause excess salivation, nausea, vomiting, anorexia, depression, or dermatitis.
If you know your cat has eaten some eucalyptus or has been exposed to the oil, call your vet ASAP. While symptoms of eucalyptus poisoning can show up shortly after being exposed, they can also take several hours to develop, so don't assume your cat is OK just because he doesn't have any symptoms.
Toxicity to pets
Small ingestions of a few leaves or low concentration eucalyptus oil leads to mild gastrointestinal distress, but ingestion of highly concentrated eucalyptus oil has been associated with severe signs including seizure, tremor, and, rarely, acute renal injury.
Citrus or lemon scents (orange peels, lemon peels), garlic, ammonia, vinegar, coffee grinds, pipe tobacco, mustard, citronella, or eucalyptus all deter cats as well. The scents diminish over time, so re-applying is necessary.
Orange and lemon peels (cats dislike citrus smells), cayenne pepper, coffee grounds, pipe tobacco, lavender oil, lemon grass oil, citronella oil, peppermint oil, eucalyptus oil, & mustard oil.
Cats, being fairly territorial, are unlikely to feel comfortable doing their business in a place that smells like another, much larger, feline already frequents it. Put down extra strength hot chilli powder. It annoys cats' paws and whiskers without causing them serious harm. They'll stay well away.
Keeping Fleas and Ticks Away
To make your own flea and tick repellent, mix one part vinegar with one part water and spray it on your pet's fur. You can also add a few drops of vinegar to your pet's drinking water to help repel fleas and ticks from the inside out.
Most cats find the pungent smell of vinegar to be overwhelming and flee the area. Most cats have an acute sense of smell and are discouraged by new, foreign, and powerful aromas. Vinegar for a cat repellent can be a humane, simple, and non-toxic solution.
Moth balls are designed to repel moths, not cats. However, some people believe that moth balls can also repel cats because of the strong scent. There is no scientific evidence to support the use of moth balls as a cat repellent, and in fact, moth balls can be toxic to cats.
The mystery of why cats hate cucumbers is normally explained by the natural fear cats have towards snakes. To a feline's eyes a cucumber can look similar enough to the pesky reptile to elicit their fear response and make them jump a few feet in the air to avoid being bitten.
Scent deterrents will either serve to repel (eg Citronella) or mark a territory (eg Silent Roar). Alternatively, try orange or lemon peel, since cats are not keen on the smell of citrus. A bucket or water pistol full of water, directed near but not at the cat, will help to chase an unwelcome cat out of the garden.
Unfamiliar Objects, Fruit or People
But it is a good example of cats being afraid of unfamiliar things (people, objects, fruits, etc.). Cats like to feel safe and secure in their home — if something new enters their space, that's probably going to cause some stress.
To keep cats away from gardens, flower beds, or specific areas of property, scatter fragrant items that don't appeal to a cat's sense of smell, like fresh orange or lemon peels, organic citrus-scented sprays, coffee grounds, vinegar, pipe tobacco, or oil of lavender, lemongrass, citronella, or eucalyptus.
Some of the most toxic food for cats include onions & garlic, raw eggs & meat, chocolate, alcohol, grapes and raisins. Avoid feeding your cat table scraps, especially around the holidays, as these may contain potentially toxic ingredients.
Try orange and lemon peels, cayenne pepper, coffee grounds, lavender oil, lemon grass oil, citronella oil, peppermint oil, eucalyptus oil, and mustard oil. You can either sprinkle drops directly onto your flower beds or soak a cotton wool around it and place at entry points.
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While it is not deadly, lavender is toxic for cats. Lavender contains linalool and linalyl acetate, which cats cannot process in their livers. This means that consuming too much lavender can lead to liver damage.
You may not realize it, but certain scents and pure essential oils like tea tree, citrus, and eucalyptus oil can be harmful toxic oils to your little feline. Many compounds in these pure essential oils contain toxins that can be fatal if your kitty breathes them in or ingests them.
Peppermint oil is highly toxic to cats.
Without the enzymes required to break down phenols, cats exposed to peppermint oil can experience: Liver damage. Breathing difficulties. Wobbliness and seizures.