#"Ever" is a very difficult word.

The limitation is greatly helped by their lack of dexterity suggesting that they're not going to build complex tools to help with the task, but even little things like identifying plants that are poisonous to their herds and killing them as they travel would be steps along the line to farming.

This behaviour would fall somewhere along the transition between true nomadic herding and transhumance, where seasonal pastures are used.

The next step would be removing plants that are of no interest to the herds or overrun the grasslands they need for food. At what point does this sort of behaviour translate into cultivation? Since their primary plant of interest is grass (or equivalent) they never need to sow seeds, but they can still work towards effective monoculture farming just by elimination of plants of no interest.

#Population limitations

Population of a species is primarily limited by food supply. A large tribe with a large herd would be able to expand, though at some point they'd exceed the number of people their herds could support. This would give an advantage to a farming tribe with greater supply of food for the herds to allow the herds to grow at an equivalent rate. To prevent this advantage the population would have to be limited by some other mechanism than food limitation.

#Drought

The rains didn't come, the grass didn't get the autumn/winter/spring growth, there's ever less food especially for those moving where another tribe has moved ahead of them. A tribe who had farmed and stored food would still be able to feed the herds from the store, again an advantage over the nomads. Possibly offset by allowing them to travel great distances relatively quickly, but it would still require quite low population density so they're not treading on each other's toes.

#Immobility

Possibly a large portion of the group were injured in a conflict or are elderly forcing them to remain in one place for longer than normal and work to improve the local pasture for the herds to survive.

#Rich grasslands

The tribe has wandered into a temperate region where they no longer need to be nomadic. As long as they do a bit of basic ground clearance to get rid of the brambles and deadly nightshade they can settle down and build.

There are many factors that could cause the tribes to settle into some sort of farming pattern. Probably initially via transhumance and improving the pastures to which they will return next season, but also through more immediate internal or external pressures.

"Ever" is a very difficult word.

The limitation is greatly helped by their lack of dexterity suggesting that they're not going to build complex tools to help with the task, but even little things like identifying plants that are poisonous to their herds and killing them as they travel would be steps along the line to farming.

This behaviour would fall somewhere along the transition between true nomadic herding and transhumance, where seasonal pastures are used.

The next step would be removing plants that are of no interest to the herds or overrun the grasslands they need for food. At what point does this sort of behaviour translate into cultivation? Since their primary plant of interest is grass (or equivalent) they never need to sow seeds, but they can still work towards effective monoculture farming just by elimination of plants of no interest.

Population limitations

Population of a species is primarily limited by food supply. A large tribe with a large herd would be able to expand, though at some point they'd exceed the number of people their herds could support. This would give an advantage to a farming tribe with greater supply of food for the herds to allow the herds to grow at an equivalent rate. To prevent this advantage the population would have to be limited by some other mechanism than food limitation.

Drought

The rains didn't come, the grass didn't get the autumn/winter/spring growth, there's ever less food especially for those moving where another tribe has moved ahead of them. A tribe who had farmed and stored food would still be able to feed the herds from the store, again an advantage over the nomads. Possibly offset by allowing them to travel great distances relatively quickly, but it would still require quite low population density so they're not treading on each other's toes.

Immobility

Possibly a large portion of the group were injured in a conflict or are elderly forcing them to remain in one place for longer than normal and work to improve the local pasture for the herds to survive.

Rich grasslands

The tribe has wandered into a temperate region where they no longer need to be nomadic. As long as they do a bit of basic ground clearance to get rid of the brambles and deadly nightshade they can settle down and build.

There are many factors that could cause the tribes to settle into some sort of farming pattern. Probably initially via transhumance and improving the pastures to which they will return next season, but also through more immediate internal or external pressures.

#"Ever" is a very difficult word.

The limitation is greatly helped by their lack of dexterity suggesting that they're not going to build complex tools to help with the task, but even little things like identifying plants that are poisonous to their herds and killing them as they travel would be steps along the line to farming.

This behaviour would fall somewhere along the transition between true nomadic herding and transhumance, where seasonal pastures are used.

The next step would be removing plants that are of no interest to the herds or overrun the grasslands they need for food. At what point does this sort of behaviour translate into cultivation? Since their primary plant of interest is grass (or equivalent) they never need to sow seeds, but they can still work towards effective monoculture farming just by elimination of plants of no interest.

#Population limitations

Population of a species is primarily limited by food supply. A large tribe with a large herd would be able to expand, though at some point they'd exceed the number of people their herds could support. This would give an advantage to a farming tribe with greater supply of food for the herds to allow the herds to grow at an equivalent rate. To prevent this advantage the population would have to be limited by some other mechanism than food limitation.

#Drought

The rains didn't come, the grass didn't get the autumn/winter/spring growth, there's ever less food especially for those moving where another tribe has moved ahead of them. A tribe who had farmed and stored food would still be able to feed the herds from the store, again an advantage over the nomads. Possibly offset by allowing them to travel great distances relatively quickly, but it would still require quite low population density so they're not treading on each other's toes.

#Immobility

Possibly a large portion of the group were injured in a conflict or are elderly forcing them to remain in one place for longer than normal and work to improve the local pasture for the herds to survive.

#Rich grasslands

The tribe has wandered into a temperate region where they no longer need to be nomadic. As long as they do a bit of basic ground clearance to get rid of the brambles and deadly nightshade they can settle down and build.

There are many factors that could cause the tribes to settle into some sort of farming pattern. Probably initially via transhumance and improving the pastures to which they will return next season, but also through more immediate internal or external pressures.

#"Ever" is a very difficult word.

The limitation is greatly helped by their lack of dexterity suggesting that they're not going to build complex tools to help with the task, but even little things like identifying plants that are poisonous to their herds and killing them as they travel would be steps along the line to farming.

This behaviour would fall somewhere along the transition between true nomadic herding and transhumance, where seasonal pastures are used.

The next step would be removing plants that are of no interest to the herds or overrun the grasslands they need for food. At what point does this sort of behaviour translate into cultivation? Since their primary plant of interest is grass (or equivalent) they never need to sow seeds, but they can still work towards effective monoculture farming just by elimination of plants of no interest.

#Population limitations

Population of a species is primarily limited by food supply. A large tribe with a large herd would be able to expand, though at some point they'd exceed the number of people their herds could support. This would give an advantage to a farming tribe with greater supply of food for the herds to allow the herds to grow at an equivalent rate. To prevent this advantage the population would have to be limited by some other mechanism than food limitation.

#Drought

The rains didn't come, the grass didn't get the autumn/winter/spring growth, there's ever less food especially for those moving where another tribe has moved ahead of them. A tribe who had farmed and stored food would still be able to feed the herds from the store, again an advantage over the nomads. Possibly offset by allowing them to travel great distances relatively quickly, but it would still require quite low population density so they're not treading on each other's toes.

#Immobility

Possibly a large portion of the group were injured in a conflict or are elderly forcing them to remain in one place for longer than normal and work to improve the local pasture for the herds to survive.

#Rich grasslands

The tribe has wandered into a temperate region where they no longer need to be nomadic. As long as they do a bit of basic ground clearance to get rid of the brambles and deadly nightshade they can settle down and build.

There are many factors that could cause the tribes to settle into some sort of farming pattern. Probably initially via transhumance and improving the pastures to which they will return next season, but also through more immediate internal or external pressures.