Whether a drug dog can smell "Delta" gummies (Delta-8 or Delta-9 THC) depends on how the specific dog was trained and the chemical composition of the product. Most traditional drug detection dogs are trained to identify the terpene "caryophyllene oxide" or other specific markers found in the cannabis plant. Because many Delta-8 or Delta-10 gummies are derived from hemp but still contain these cannabis-related aromatic compounds, a dog may indeed alert to them. However, many modern police dogs in "legalized" states are no longer trained for marijuana at all to avoid "false alerts" for legal substances. In an airport or border context, TSA and Customs dogs are often focused more on explosives or large-scale narcotics (like cocaine or heroin) rather than personal-use edibles. It is also important to note that the manufacturing process of gummies involves heavy flavorings and sugars which may "mask" the scent to a human, but a dog's olfactory system is thousands of times more sensitive. While a dog can physically detect the presence of cannabinoids, the legality of the "Delta" product and the specific training of the dog determine whether an alert will result in a search or legal consequence.