snort at

snort at someone or something

to show one's displeasure with someone or something by snorting. The customer snorted at the waiter for his surliness. The customer snorted at the prices and walked out.
See also: snort
References in classic literature ?
All day the fire-steed flies over the country, stopping only that his master may rest, and I am awakened by his tramp and defiant snort at midnight, when in some remote glen in the woods he fronts the elements incased in ice and snow; and he will reach his stall only with the morning star, to start once more on his travels without rest or slumber.
I've witnessed them snort at housecats, raccoons and many other smaller mammals we often encounter.