Short answer — in the U.S., “premium” pet food typically costs:

• Dogs (premium brands / higher‑quality formulas)

  • Small dog (under ~20 lb): about $40–$100 / month. (dognizant.com)
  • Medium dog (20–50 lb): about $60–$160 / month. (dognizant.com)
  • Large/very large dog (50+ lb): about $100–$300+ / month (giant breeds or very calorie‑dense fresh/raw diets can be higher). (dognizant.com)

• Cats (premium dry/wet/raw)

  • Typical premium dry kibble: roughly $30–$60 / month. (a-z-animals.com)
  • Premium wet, fresh, raw or prescription diets: roughly $40–$100+ / month depending on how much wet/raw is fed. (a-z-animals.com)

• Fresh / human‑grade / subscription meals (e.g., The Farmer’s Dog, Nom Nom, etc.)

  • Expect $78–$600+ / month depending on pet size and whether you feed a full fresh meal plan. Small dogs are at the low end; large/active dogs at the high end. (vety.com)

Why the wide ranges (shortly):

• Pet size and calories needed (bigger dogs eat a lot more). (vety.com)
• Food type: dry kibble < canned/wet < fresh/raw/air‑dried/freeze‑dried. (vety.com)
• Special or prescription diets and premium ingredients drive price up. (petplace.com)

If you want a tighter estimate, tell me the animal (dog or cat) and its weight (or breed/size) and whether you feed mostly dry, wet, or a fresh/raw subscription — I’ll convert that to a monthly dollar estimate using real brand/pricing ranges.