Most cats & dogs are lactose intolerant, meaning they can't properly digest milk due to a lack of the enzyme lactase.

Even pets that can tolerate milk may experience an upset stomach after consuming it. Resulting in vomiting and diarrhea.

Milk is calorie-rich. Giving it to your pet without accounting for the extra calories can lead to weight gain, which can have negative health consequences.

Milk lacks essential nutrients that a pet needs in their diet. Providing milk as a treat can displace healthier, nutritionally balanced foods.

In some cases, pets can develop allergies to milk or dairy products. Allergic reactions may manifest as skin issues, ear infections, or gastrointestinal problems.