some prefer comm pet food while others dont.
petfood is easy to serve and it is healthy.however,u can give him home made too which if given in proper qty can b even healthier.
u can feed him 1 boiled egg for brkfast, no milk, if he likes u can give him little cottage cheese, for lunch & dinner u can feed him rice,chicken(no chkn bones),frenchbean,dodhi,carrot .this is very healthy.non veg part shud b 1/3rd d qty u give him and d rest shud b rice & vegetables.instead of rice u can give him brown rice or also lapsi(i dont know wat its called in eng, but most retailers know it.its made from wheat.its better than rice.
give him seven seas as it is very healthy for dogs.
and provide him proper exercise as pugs tend to become over weight very fast.
d qty depends on how much ur pug is eating.if u think he is having less,dont change d qty immediately next day.let it b for 4 days and only after 4 days increase it to some extent. there shud b an interval of 4 days before increasing the diet qty.