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Is my snake a healthy weight?
Weight alone can't tell you if a snake is too thin or too fat — a 1,500 g ball python can be ideal or obese depending on its length and build. Body shape can. This 5-point body condition scale is written for ball pythons first and works for most pet snakes. Look at the neck, spine, belly and tail, then pick the closest match.
- 1 · Underweightcross-section
- neck
- The head looks too big for the neck; the neck is pinched right behind the jaw.
- spine
- A sharp ridge runs down the back and you can see the ribs as lines along the sides.
- belly
- Flat or dished inward, so the body looks like a tent from the front.
- tail
- Starts suddenly and thin, with no padding where the body meets the vent.
- 2 · Slimcross-section
- neck
- Neck a little narrower than the head, which is normal.
- spine
- You can see the backbone line, but it is soft, not a sharp edge.
- belly
- Flat but not sunken, with a slight thicker section mid-body.
- tail
- Tapers fine. Many healthy, growing juveniles look like this.
- 3 · Idealcross-section
- neck
- Smooth step from the head into a firm, muscular neck.
- spine
- Back is gently rounded; you feel the spine more than you see it.
- belly
- Flat and wide, the body sits like a loaf on the floor with no wrinkles when coiled.
- tail
- Body narrows evenly into the tail with no lump in front of the vent.
- 4 · Overweightcross-section
- neck
- Neck looks as thick as the head or thicker.
- spine
- Hard to see at all; the top of the body is a smooth dome.
- belly
- Skin folds or rolls show when the snake bends or coils.
- tail
- Soft padding collects just in front of the vent before the tail begins.
- 5 · Obesecross-section
- neck
- Thick, with fat bulging behind the jaw.
- spine
- Not visible — there may even be a groove where the spine should be.
- belly
- Big rolls when coiled, skin stretched between scales, body spreads out flat.
- tail
- An obvious fat pad sits before the vent and the tail looks stubby.
What now?
- Underweight (1): check feeding amounts and how often you feed, then husbandry — temperatures, hides and stress all affect appetite. If it doesn't improve, or weight keeps dropping, book a vet visit.
- Slim (2): fine for juveniles and many adults. Keep weighing and watch the trend.
- Overweight or obese (4–5): ease off gradually — slightly smaller meals or longer gaps between them, never a sudden fast. Add enrichment and more room to move and climb.
This guide is for general information and doesn't replace a vet. If your snake seems unwell, or you're unsure, see an exotics vet.
Track body condition next to weight — free in Recovery Reptiles
Pick a picture when you weigh, and see condition and weight together on one chart.
Track body condition next to weight — free in Recovery Reptiles