This is my first post ever on a forum so here goes, I hope I'm in the right place for this question. I purchased two dart frogs back in July of this year from Josh's frogs. I received my first one and the high of opening up little Mirage was definitely addictive and I instantly had to order another the following weekend after paycheck. So I did. They are green sips, and I'd imagine since I ordered them from the same breeder and within such a short span of eachother, they would be from the same clutch of eggs, or at least incredibly similar in age. What I am hoping for is that I got lucky and my first two frogs are a pair. Mirage (larger with more blue) has always been larger than Eclipse (smaller). I have monitored them like a hawk daily, I'm a very concerned frog parent at all times. I ensure that both are fed very properly and the fruit walks are always dusted up before their demise. I have seen next to no fighting amongst the two except for the first day or two of them being tank mates. This was Mirage getting territorial over the tank she had been in for a week by herself. But now they will chill out together and then go their own ways without fighting. They eat right next to eachother sometimes and then they'll go off and hunt on their own in their enclosure. Both have certain spots they like to sleep for the night and everything seems to be well established and they are happily cohabbing. They live in a 18x18 with plenty of space. But my actual question after you know a little about my friends and I will definitely supply more photos as best of my ability, is this size difference something to be alarmed of due to a stressed frog that I'm just blind to? Or is this size difference fairly normal at this point in their life span assuming they are a pair? Also with that being said, say I do have a pair on my hands, should I breed them or allow them to breed? I'm not as educated in the genome part of biology as many on this board but my somewhat pee brain knows that imbreeding isn't good for the gene pool. Thanks alot for making it this far and thanks even more for feedback!