New to forum. Pacman frog sexing/age questions

[AwesomePossum]

I know this is probably an overasked question, but I was wondering if I could get input on determining the sex or possibly the age of my pacman frog. I've never owned a frog before, but I lost my pet barred tiger salamander to liver failure (according to the vet) a while ago and have been wanting another amphibian since. I got this one from a petstore. I know it's an ornate, but this is all the info I have other than it was clearly the largest of the little ones available (aside from an older, fairly chonky albino). I know it's an ornate, but that's all the info I have. When the employee went to take it out for me to look at, little one went right after her hand.

The enclosure is currently a medium-sized kritter keeper. Have 2 inches or so of eco-earth, small amount of moss in one corner, and a shallow water bowl. Half the top is covered to hold humidity, and I lightly mist the tank once or twice a day accordingly. Ambient temp is approx 84-85. Each day I've been feeding it 1-2 nightcrawlers (supplemented in multivitamin, as well as calcium), which are gobbled down in seconds and without issue.

This is a picture of him/her when we got home (looked very small, mostly mouth):


And four days later:



The first of these two better represents the actual change in size so far. Second is just a better shot of the front.

Got girthy...real fast.


Probably too soon to say?


My boyfriend has a male that started croaking between 4-5 months of age. Haven't heard any croaking yet, and don't know how old this one is, if its even possible to tell.


By the way, of course I also welcome any advice, or suggestions. To be honest, I am hoping it's female. Do certain species show a trend of getting on the larger side more readily? Or is this determined primarily by age and diet? Thanks!