Hujitese

Hello everyone, so after stopping playing Pokemmo since 2014, I came back to play with some friends, I wanted to help them get some pokemons I have by breeding them. So after I visited day care the old man said that for 2 pokemons I can get an egg but I will lose those 2 pokemons forever. So anyone could tell me what is changed on day care? I can no longer farm for pokemons to get shiny? How does the new system works? Thanks for your time.