Sick Oak trees

[Griffindore]

Hi, I live in an oak tree area. In front of my house are two enormous oak trees. One has lots of Capricorn beetle holes , some brances have been cut of, but has leaves. The other has NO leaves at all this year, has crack of a mtre up the bark, bark depth, at its base. My neighbour says it could be very dangerous and should be felled. I am in shock. Advise sought ?

[idun]

https://www.google.com/search?q=old+oak+trees&client=ubuntu&hs=ZT1&channel=fs&tbm=isch&source=iu&ictx=1&fir=pYj405V_kKVZgM%253A%252CQBqKOSRMTKGjzM%252C_&vet=1&usg=AI4_-kQdrQJ9M2ZkMARpAOew-FWy_WA_PA&sa=X&ved=2ahUKEwio2avCwN_kAhWGEMAKHaeaABgQ9QEwAHoECAAQAw#imgrc=HEJfrWP9pWqEeM:&vet=1

How do you know it is sick????

Above should be a live link showing photos of old oak trees.

I know that they split, when old, so maybe IF you can find a proper arborist to look it, would be a good idea.

France used to be sadly lacking in proper tree experts who should have been pollarding properly but simply butchered the trees and they eventually died off from annual abuse. ie our village had to have them all cut down and new ones replanted, as did lots of other places.