Many small mammals, including squirrels, rats, skunks, and chipmunks, are repulsed by the urine of red foxes. Fox urine’s potent scent and unstable chemical composition make it an especially effective repellent. Thus, a lot of people use fox urine that is readily available to them commercially to naturally keep pests out of their gardens.
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Fox urine primarily contains water, urea, creatinine and excess minerals. Throughout the year, the fox’s urine’s chemical composition varies based on its diet and hormonal fluctuations. The precise ingredient in fox urine that prey animals pick up on is unknown. Many animals respond well to fox urine deterrents, even if they have never encountered a fox before.
Smaller animals are generally more effectively deterred by single-molecule scents found in the urine of predators. Predator urines, however, appear to work better if they contain remnants of the prey animal, particularly in the case of larger animals. For instance, the urine of Tasmanian devils only caused eastern gray kangaroos to react if the devils had been fed kangaroo meat prior to the urine samples being taken.
Commercial fox urine does not effectively keep foxes themselves out of a garden; in the wild, foxes use their own urine to warn and deter other foxes from their territory. Conversely, it’s claimed that male human urine helps keep foxes out of gardens. Foxes can be deterred by chemicals such as aluminum-ammonium sulfate salts or carbonyl methyl nonyl ketones scented with citronella. Other well-liked natural fox deterrents include electric fencing, netting, ultrasonic devices, guard dog ownership, and putting spicy marinated meat close to chicken coops to scare away foxes.
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