I would make sure you get a good 30 quarantine on the fish you set into any other tank. Some places say 40 days. I tend to do 30 if there is no incidences of illness in the tank, then they are good to go. Nom Nom Nom
Sounds like you have a nice set up with places for fry and frogs to hide. Guppies sound happy in their tank i they are dropping young too. I found that if I kept feeding the frogs each day guppies didn't disappear much. You may find some fry and such missing when you do. It doesn't hurt them, the frogs, and certainly makes things more challenging for the them. Brings out the scavenging instinct. Remember that you can fast the frogs as well. I do this with my fish tanks too. I usually do not feed on weekends. It works well for me because then I don't have to go to the school on weekends when I have them in classroom. Some weekends we would come back to class and find guppies missing.
Piggy, on of our frogs would eat herself to death if I let her. She is the one who has had some bloat before. She is also the escape artist. We lost her last week after she found a way to get out of the cord opening on the tank. I found her the next morning. I was pretty sad. The lasted another 12 hours and was gone.