My mom’s Yorkies wake her almost every night. They hear deer outside in the yard. This is a house built in 1989 with heavily insulated walls. We can’t even hear a lawn mower out in the yard. But the Yorkies can hear deer nibbling on the shrubbery at 2AM.
We often watch TV with it very loud (mom & dad are both hard of hearing). The dogs are snoring away on mom’s lap. It’s painful for me sometimes. Especially the shrill commercials.
How can an animal have very sensitive hearing and not be distressed in loud environments?
I can crank up Black Sabbath and the dog never reacts.
They cope with the blaring TV the same way you do. It is almost certainly not pleasant for them but they have no choice in the matter so try to tune it out and carry on with whatever they are doing. At some point it will damage their hearing with long term exposure to loud enough noise.
As good as a dog’s hearing is their sense of smell is even better, so without more information it’s also possible they smell the deer but are already hard of hearing and the TV doesn’t bother them anymore.