Newborn Kitten Stopped Meowing

My cat is 13 yold is normal eats and drinks well 5 days now not meowing as much today not at alll not interested in meowing took him the vet doesnt know why running tests has a heart murmur any ideas has been sneezing and coughing not lately today a sneeze no temperature im a little worried.
Newborn kitten stopped meowing. Kittens with good nursing care can recuperate from these infections in a week but if your kitten completely loses appetite and even stops meowing take a trip to your vet. If a kitten seems vacant or fatigued and is crying you ll want to seek medical attention immediately. Lethargy not getting up unable to stand or move limp cold to the touch cold ears cold body cold feet especially the bottom of their feet unresponsive very young kittens will still respond to touch and stimulation when they are healthy and thriving gasping for breath. Make sure the litter box is small enough so that your kitten can easily get in and out of it.
Illness may not always be visually obvious to a caretaker but a kitten s cries can indicate that something is causing her distress. Cats and kittens are very sensitive about cleanliness especially of their litter boxes. Keep your kitten s litter box clean and available to it which may also stop your kitten from crying. Kittens meowing how and why baby cats meow.
Respiratory infections are easy to notice because they re characterized by meowing sneezing runny eyes and lack of appetite. I personally think that cat breeders would just stop doing that. A kitten s sorrowful cries could be an indication that the kitten is sick.