Most normal farmers will have signs up this time of year “keep out, bull in field” thats a standard sign for most that don’t want you around.
Which, if it is a public right of way, may well be an offence
https://www.gov.uk/guidance/public-rights-of-way-landowner-responsibilities
Livestock on land crossed by a public right of way: banned animals
Bulls of recognised dairy breeds (Ayrshire, British Friesian, British Holstein, Dairy Shorthorn, Guernsey, Jersey and Kerry) that are over the age of 10 months are banned by law from fields containing a public right of way.
Bulls over 10 months of any other breed must be accompanied by cows or heifers when in fields with public access.
Make sure that any warning notices relating to a bull are displayed only when it is actually present in a field.
Horses may be kept loose in fields crossed by public rights of way, as long as they are not known to be dangerous.
You can be prosecuted if you keep any potentially dangerous animal on land crossed by a public right of way.
FWIW, I avoid livestock – cows and horses. Cows are big and stupid. Horses are big and not so stupid, but not clever enough, either. Clever enough to be neurotic, I reckon.
My daughter is utterly terrified of cows – proper quaking in her boots scared. Which means many public footpaths are inaccessible to us in the lower valleys