It is not strictly within the scope of this website – but we know of many elderly vizslas that develop a condition known as Laryngeal Paralysis.The principal signs are noisy, wheezy breathing and heat/ exercise intolerance (because of lowered oxygen levels) A lot of these vizslas have been helped by a procedure known as “tie-back surgery”
This is a very good article
https://willows.uk.net/specialist-services/pet-health-information/soft-tissue/laryngeal-paralysis/
Please do make contact if you would like further advice
Here is a video clip of an affected dog – turn up the volume to hear a very distinctive wheeze. This girl had successful tie back surgery at 13yo and lived another 2 great and active years where she breathed easily once again