are cats a potential problem if chooks left to free range?

In weather like this our Freya can often be found in the coop door way, the chickens just walk over her once I found her in a a nest box with Tinker she's a strange cat

Depnds on the personality of the birds and the cat. size of the birds can make a difference but in my experience cats have always been the ones to have been troubled by the birds.

I remember our other choocks doing this when a cat was on the top of the fence, they would make a real fuss

We have no problems when our chooks are freeranging as our cat is terrified of them and will only be brave and pounce on them if I am in the garden-silly puss
Also we have lots of neighbourhood cats and they seem not to bother with the chickens either,unless they got pecked and did'nt try again.

i now have to lock my chooks up when im not at home,thought we were safe from foxes mink etc as the garden runs down to a river but alas we lost several of my lovely birds to mink during an afternoon,then a fox came over neighbouring fences early evening,we dont take chances now