Possible check the health conditions and blood tests of
liver and
kidney functioning!!! Especially one year old means from age of puberty he may have hormonal fluctuations. So if ur agree get him neutered can control the meowing in a different situations like night times or environmental changes , possible give Anxocare tablet in night times for a week to control anxiety and meowing.
Next Steps
Neutering is best option to control
Health Tips
-Try to pampaered more give moral support to ur pet
-Night times avoid dark and strange sounds etc
-Give plenty of food and fluids