Hey abigayle welcome aboard!

Bloating is usually gradual unless it is impacted. Small fish are safe to feed except for goldfish and other cyprinids with a golden/orange color as they contain a higher than normal thiaminase content that is dangerous in the long run for most animals, mealworms have really tough skin even for big amphibians and could cause impaction if fed a lot at one go. You could feed it some superworms with a crushed head as treats as they have lower chitin content than mealies. Silkworms are also nice. Crickets are okay as long as you remove the hind legs. Earthworms and nightcrawlers are the best though. It is soft and hones their hunting skills