What Size Mouse Should I Feed My Snake? (Feeder Sizing Guide)

Feeding a snake the wrong size prey causes real problems: prey too small leads to underfeeding and constant hunger behaviour; too large risks regurgitation, which is stressful and dangerous for the snake. Here's how to get it right every time.

The golden rule

Feed prey roughly the same width as the thickest part of your snake's body — about 1 to 1.25 times its girth. A properly sized meal leaves a slight, noticeable lump that disappears within a day or two. If you're ever between sizes, choose the smaller one and feed slightly more often.

Mouse sizes explained

Feeder mice are sold by growth stage, and the names confuse everyone at first:

• Pinkies — newborn mice, no fur, roughly 1–3g. For hatchling snakes.
• Fuzzies — fur just coming in, roughly 3–6g. For young juveniles.
• Hoppers — fully furred and mobile, roughly 6–12g. For growing juveniles.
• Weaners — recently weaned, roughly 12–18g. For sub-adults.
• Adults — full-grown mice, roughly 18–30g. For mature small-to-medium snakes.
• XL adults — the largest mice, 30g+. The last stop before moving to rats.

Matching mouse to snake (common SA species)

Corn snakes: hatchlings start on pinkies, progress through fuzzies and hoppers, and most adults settle on adult mice for life.

Brown house snakes: similar progression to corns; adults typically take adult or XL adult mice.

Ball pythons: hatchlings start on hoppers or weaners, but ball pythons outgrow mice quickly — most keepers switch to rats early, because one appropriately sized rat beats multiple mice.

Kingsnakes and milksnakes: pinkies through adult mice, tracking their growth.

Juvenile boas and pythons: start on larger mice, but plan the move to rats — it's easier to transition a young snake than an adult that's imprinted on mice.

When to move up a size

If your snake strikes and constricts eagerly, finishes fast, and shows no visible lump afterwards, it's ready for the next size. Growth spurts in juveniles can mean moving up every few months, so reassess regularly rather than reordering the same size on autopilot.

When to switch from mice to rats

Once your snake is comfortably handling XL adult mice, it's time. A single small rat delivers more food, better value and a more natural feeding pattern than two or three mice. Our frozen rats run from pinkie to jumbo, so there's a matching size for wherever your snake is.

Thawing frozen feeders safely

Move the mouse from freezer to fridge the night before feeding, or submerge it (in a plastic bag) in cool water for 30–60 minutes, then warm the water slightly for the final stretch. Offer at approximately body temperature — many snakes refuse cold prey. Never microwave a feeder, never feed one that's still frozen in the middle, and never refreeze a thawed mouse.

Why frozen-thawed beats live

Beyond convenience: live rodents bite, and rodent bites cause serious injuries to snakes. Freezing also kills most parasites. Frozen-thawed is the standard recommended by reptile vets worldwide, and every snake can be transitioned with patience.

Stock up

Our frozen mice come in packs of 10 across all six sizes from R125, raised on a vitamin-enriched diet and shipped frozen with ice packs anywhere in South Africa. Growing snake? Browse the frozen rats too.