Some have to start young and some don’t like strange stuffs going through their fur and some may have bad experiences while being groomed.
Some allowed to be groomed while being carried or while at rest. Maybe you can try slowly as some fur may be matted and if the brush catches on the matted part, it may hurt the cat and therefore they don’t like being groomed.
I don’t own a long hair cat so I can’t tell you how to groom them. My boy is a short hair cat and he’s used to be brushed every day.
Some allowed to be groomed while being carried or while at rest. Maybe you can try slowly as some fur may be matted and if the brush catches on the matted part, it may hurt the cat and therefore they don’t like being groomed.
I don’t own a long hair cat so I can’t tell you how to groom them. My boy is a short hair cat and he’s used to be brushed every day.