1.9 Tag command

./summon Chicken  2 ~ {Tags:["summoned","spy"]}
./scoreboard players tag @e[type=Chicken,tag=!summoned] add naturalSpawned
/summon ArmorStand   ~ {Tags:[0:"hello"]}
/testfor @e[tag=spy,tag=summoned]


/give @p minecraft:spawn_egg 1 50 {EntityTag:{Fuse:0}}
/give @p spawn_egg 1 50 {EntityTag:{Tags:["Tag1","Tag2]}}