Seeing my puffers

Hey there all. These are 3 of my 5 puffers. I am hoping somebody may help me intercourse them? I’ve solely had them 2 weeks and I’ve learn they’ll develop a gender when a dominant male is established? From what I’ve seen to this point they’re have just a little perspective to them particularly when feeding. I feed them 3 occasions a day, and as you may see, they’re consuming properly. I recognize any kind of suggestions, thanks.