Fast pace cut time cut back - gallop - someone earlier said it was "poll " ( cut) and " ag " ( age cut ) all back but I cannot find a definition of poll as cut anywhere !!
cut the horns off (an animal, especially a young cow).
ARCHAIC
cut off the top of (a tree or plant), typically to encourage further growth; pollard.
"there were some beautiful willows, and now the idiot Parson has polled them into wretched stumps"