Groups work outdoors, not in a table
A Hermann's tortoise is a Mediterranean grazer built to wander a wide, dry territory, and whether it can share depends mostly on how closely the enclosure resembles that. In a large outdoor pen with deep planting, multiple hides, feeding areas at opposite ends, and sightlines broken by shrubs and logs, a group of females usually settles into a live-and-let-live routine. The same tortoises in a small indoor table are in each other's way at every turn, and friction that space would have dissolved becomes daily. Space is not a luxury for this species; it is the mechanism that makes sharing possible.
Males and mixed groups are the flashpoints
Two male Hermann's tortoises read each other as rivals for territory and mates, and their arguments are physical: ramming shells, biting at legs, and trying to flip the other onto its back, where a tortoise can overheat or suffocate if nobody is watching. A male kept with one female creates a different problem — relentless courtship, with the female rammed and pursued around a pen she cannot leave. Mixed groups only stand a chance outdoors with several females per male and genuine room for a female to walk away and be left alone. Even then, a persistent male may need his own pen for parts of the year.
Quarantine and identity before any group grows
Every new Hermann's tortoise should live alone for a proper quarantine stretch before joining a group, with its own feeding and a vet check, because respiratory illness and parasites move readily between tortoises that share grazing and water. In a group, lookalike animals create a practical problem owners underestimate: which tortoise lost weight, which one produced the soft dropping, which one is due its check-up? Weigh each animal on a schedule, photograph shell patterns, and keep notes per individual from day one, not after the first confusion. Never mix Hermann's with other tortoise species in the same pen; their disease risks and courtship behaviour cross badly.
Watching a group through the season
Check a shared pen daily for the quiet signs of a tortoise losing out: one animal always retreating to the far hide, bite marks on the rear legs, a flipped tortoise, or a female who has stopped coming out to bask and feed. Spring, when males wake up full of intent, is when groups most often need rearranging. A tortoise that is flipped, bitten repeatedly, breathing with an open mouth, or off its food for more than a few days in warm weather should be separated and seen by a reptile veterinarian; in a group, waiting to see if it improves usually means the others keep making it worse.
Keeping several lookalike tortoises' records apart
A group of Hermann's tortoises can live together for decades, which makes tidy per-animal records the difference between good care and guesswork. KinsLe Pet Passport keeps each tortoise's weights, vet visits, and health notes gathered as its own portable packet, so when one animal from the pen goes to the vet, its history travels with it instead of being reconstructed from a shared notebook and a keeper's memory.