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.
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.
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.
Vinegar as a cat repellent
White vinegar can be used either full-strength or diluted with water to repel cats. If objects or plants could be damaged by applying vinegar full-strength, dilute it with one or two parts water before using it as a deterrent.
Texture: Sticky paper, aluminum foil, heavy plastic or a plastic carpet runner (knubby side up) can be placed in areas you want to be off limits. Cats hate walking on these surfaces.
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.
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.
All citrus fruits (grapefruit, oranges, limes and lemons) are mildly toxic to cats. Consider every part of the fruit, from the seeds to the fruit and skin, to be toxic for your feline. The substances found in lemons (Citrus limon) is toxic to your cat, even though you and your family can safely ingest lemons.
Loud Noises
Of all the cat fears, this one probably is the most relatable. Sudden loud noises can really startle your cat and cause them to either jump or go run and hide for a while. Things like the vacuum cleaner tend to trigger a cat's anxiety and send them to their favorite hiding spots.
Other Cats and Dogs: Dogs top the list for giving cats goosebumps! Cats can get frightened when they notice unknown dogs or cats wandering into their territory. High stress levels can even lead to cats attacking one another. So provide them a secure environment where they can live and roam fearlessly.
A cat sees that cucumber is a threat, and when confronted with a "threatening situation," explain PAWS Chicago, cats respond with fear and anxiety. This instinctive reaction is visible when a cat is surprised by a cucumber: jumping up or, conversely, freezing in place; fur standing up; yelping and so on.
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.
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, vinegar, or oil of lavender, lemongrass, citronella, or eucalyptus.
To prevent your cat from scratching hard surfaces around you home, dab the areas with a little Vicks VapoRub. Cats don't like the smell and will stay away from the area.
Cinnamon contains coumarin, a naturally occurring compound that's medically used as a blood thinner. "A large dose could conceivably cause problems for your cat with clotting," Eldredge says. She adds that cats may also get a reaction in their mouths when they ingest cinnamon, such as redness and irritation.
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.
Many liquid potpourri products and essential oils, including oil of cinnamon, citrus, pennyroyal, peppermint, pine, sweet birch, tea tree (melaleuca), wintergreen, and ylang ylang, are poisonous to cats. Both ingestion and skin exposure can be toxic.
If you have a furry feline who insists on scoping out your living room from half way up your Blue Spruce, here's an easy way to keep them grounded for good! Try placing citrus peels like oranges and lemons under your tree skirt. In general most cats detest citrus and will keep their distance.
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.
Citronella oil is a homemade cat repellent that many people have had success with. Citronella is best known as a mosquito repellent, but cats find the Citronella odor to be distasteful. Simply mix one part Citronella oil to four parts water and spray liberally in the troubled areas.
Some cats just don't care for strong smells, so use their natural aversion to aid your no-cat zone cause. To help keep your feline friend from scratching the couch or jumping on counters, squeeze a little lemon or orange zest on these spots, or sprinkle coarsely chopped citrus around the area.