The Dartmoor Pony Training Centre is publicising a bid to seek homes for nine young ponies on behalf of an owner.
"Unfortunately, we are full at the centre and unable to take on any more," the centre said.
"If we did we would risk the welfare of the ponies we have by taking on too many, which we just can't do."
The Dartmoor Hill ponies, all colts, face uncertain futures unless homes can be found.
"They are currently living on the moor; some are friendlier than others and some allowed me to touch them," said a woman named Mary, who is behind the effort to find the animals new homes.
"They were late foals last year and were too young to go to the sales, and most were colts.
"We desperately need homes for these gentle-temperament ponies."
The ponies will make 11.2 to 12 hands, some perhaps 13 hands.
They are still on their mothers and running free on the egdes of Dartmoor, on the moor in and around Lee Moor village, between Cornwood and Shaugh Prior near Plympton Plymouth.
Help has been offered for cheaper passporting/microchips and gelding for any serious homes offered. A genuine home is needed for all these colts.
Mary continued: "I feed them twice daily. I don't have to and I do not own them. I have spoken to the farmer and he doesn't know what to do with them ... he doesn't want to shoot them and prefers them to get homes instead."