Tunnels, bridges and levels: structuring your rodent’s cage
Tunnels, bridges and levels turn a bare cage into a real territory: they multiply the usable surface, create hiding places and reproduce the rodent’s natural patterns of movement. Well chosen — untreated wood, cork, ceramic, with a diameter suited to the species — they are the best-value enrichment there is, at 5 to 30 € apiece.
Which tunnel for which species?
- Dwarf hamster: 6 to 7 cm diameter; Syrian hamster: 8 to 10 cm minimum.
- Rat and guinea pig: 10 to 15 cm — wide tunnels where animals can pass each other without getting stuck.
- Gerbil: tunnels buried in the substrate, in cork or ceramic.
- Safe materials: natural cork (10 to 25 €), wood, bamboo, ceramic, unprinted cardboard (free).
Avoid narrow "habitrail"-style plastic tubes: poorly ventilated, hard to clean and too tight for an adult Syrian.
What are wooden bridges actually for?
The flexible wooden bridge (5 to 12 €) is a multi-tasker: arch-cum-hideout, gentle ramp between two levels, or retaining wall against collapses in a tank. Made of raw wood strung on wire, it can be gnawed safely and contributes to dental health, just like our chew toys.
Levels and platforms: how to install them safely?
For rats, born climbers, levels are essential: solid shelves (never wire mesh — beware bumblefoot), spaced 30 to 40 cm apart at most to cushion falls — our guide what cage for a rat covers the heights in detail. For hamsters and guinea pigs, keep platforms to 10 or 15 cm with a wide ramp: these species fall badly. Set up a refuge zone beneath each platform.
How do you keep the layout interesting?
Move one or two elements every fortnight, never everything at once (scent landmarks matter!). Hide a few seeds in the tunnels to turn the layout into foraging ground. Find all our ideas in the toys and enrichment category.
Frequently asked questions
Is cardboard really safe?
Yes, as long as it is plain, with no ink, tape or visible glue: kitchen-roll tubes, kraft boxes. Replace it as soon as it gets soiled.
How many elements should a cage hold?
Enough to create hideouts and routes, but not so many that they block running: keep at least half the floor space clear.
Are plastic tunnels off-limits?
No, but reserve them for species that do not chew them, and choose large, ventilated diameters that come apart easily for cleaning.
This guide is part of Planète Pets’s Rodents universe. Our advice is general in nature: for any health concern, your veterinarian remains the only reference.