Buff Orpington sexing *help!*

[MysteryChicken]

I recently became the mum of 18 (yes. 18!) Orpington day olds. The blacks, blues and splash's I'm pretty content with their gender but the buffs have me STUMPED! I change my mind depending on the time of the day with most of them and id love some help figuring them out. I've got 5 in total.
Today I think I've got 3 cockrels and 2 pullets what do you guys think ?

You only have 1 pullet it looks like.

 

[Aussiechickgirl]

I didn't know wildlife parks took in cockerels.

They are for feeding purposes

 

[RoostersAreAwesome]

They are for feeding purposes

Oh, I see.

 

[Aussiechickgirl]

Oh, I see.

Funnily enough, the chicks actually came from the same place! They have a complete breeding set up from incubation/rearing/slaughter purely for meat birds. We have a terrible cockrel dumping issue in our state and if more people were more responsible with 'disposing' correctly there wouldn't be such harsh rules on owning roosters