Tuna Fillet Chewy Cat Treats

Tuna fillet is commonly used in pet foods and treats as a highly palatable, lean animal protein that provides EPA/DHA omega‑3 fatty acids, B vitamins (notably B12) and minerals like selenium, supporting skin and coat condition, cognitive health and general protein needs for both dogs and cats. It should be fed in moderation and within a balanced diet because frequent large servings—especially canned tuna—can contribute to mercury and excess sodium exposure, and raw tuna may carry parasites or enzymes that affect thiamine; prefer cooked, boneless, unsalted preparations and consult your veterinarian for long‑term use.

Glycerol (glycerin) is used in pet foods primarily as a humectant and sweetening agent to retain moisture, improve texture and palatability, and serve as a solvent or carrier in wet foods, treats, and liquid supplements. It provides a modest source of metabolizable energy for dogs and cats, but in large amounts can cause gastrointestinal upset and may affect blood glucose, so products intended for diabetic pets or sensitive animals should be used with caution.

Potato starch is a highly digestible carbohydrate commonly used in pet foods as a binder, thickener and texture agent to help kibble formation, stabilize wet formulas and create chewy treats. It provides readily available energy but is low in protein, fat and micronutrients, so while generally safe, its high glycemic load and limited nutritional value mean it should be used sparingly—particularly for overweight pets, diabetic animals or cats on low‑carbohydrate diets, and excessive amounts can sometimes contribute to loose stools.

Chicken fat is used in dog and cat foods as a concentrated energy and flavor source that supplies essential fatty acids (notably linoleic acid) and aids absorption of fat‑soluble vitamins, improving palatability and supporting skin and coat health. Because it is calorie‑dense, diets must account for added fat to prevent weight gain, and quality (proper rendering and antioxidant protection to prevent rancidity) is important; although fats are less commonly allergenic than proteins, pets with poultry sensitivities may still react in some cases.

Fish oil is commonly added to pet foods as a concentrated source of healthy fats—primarily the omega‑3 long‑chain fatty acids EPA and DHA—to boost energy density and palatability. EPA and DHA support skin and coat condition, joint and cardiovascular health, and brain development (cats require preformed DHA), but fish oil is calorie‑dense, can oxidize if not properly stabilized, may contain environmental contaminants unless purified, and high doses can cause gastrointestinal upset or affect blood clotting, so product quality and appropriate dosing are important.