Whole prey feeding is meant to mirror what a reptile would catch in the wild, and the reason frozen prey is graded so precisely by size is that a mismatch between prey and predator is a choking risk, not just a portioning inconvenience.

These are jumbo mice — over 31g each — sold frozen in a pack of five. Monkfield's own analysis puts them at 67% moisture, 21% protein and 9% fat. As with any frozen feeder, they need thorough defrosting before use: naturally, at room temperature on newspaper or kitchen towel, away from food and food preparation surfaces, never in warm water or a microwave.

• Jumbo mice, over 31g each
• Pack of 5
• Analysis: 67% moisture, 21% protein, 9% fat
• Must be fully defrosted at room temperature before use, never in warm water or a microwave
• Hands should be washed thoroughly before and after handling

On sizing. Jumbo sits at the top of Monkfield's size scale, which runs down through Large, Medium, Small and Fluffs to Small Pinks — if your reptile is closer to the middle of that range, this is the wrong end of the scale to be ordering from, and it's worth checking against your animal's needs first.

Who it's for: keepers of larger reptiles whose feeding size calls for jumbo mice, wanting a pre-portioned frozen pack rather than sourcing prey loose.