Home Made Balun For Uhf Antenna Is It OK To Use Home-made Yogurt As The Starter For A New Batch Of Home-made Yogurt - And So On And So On?

Is it OK to use home-made yogurt as the starter for a new batch of home-made yogurt - and so on and so on? - home made balun for uhf antenna

I made my own yogurt at home with a few tablespoons of the previous batch homemade yogurt as starter for the next batch. Months, I have not used any commercially made yogurt as a starter. My yogurt tastes excellent. Is there something wrong with keeping the culture and the infinite case? Are the proportions of different strains of bacteria in the yogurt change over time?