Slow change is the best and mine thrive on the Peters Pellets…
Fly’s don’t actually lay eggs, when you see those little bunches of short yellow fibres that look like eggs, that’s live maggots. A fly could have gotten in and left one behind they do grow very quickly.(If it was very advanced it could have been in there a while and it would depend on the species)
Nope, I’d say that the change of pellets was just a little quick for his tummy, but as you said, not a lot of options I would have tossed the bag too. Do you know what brand the breeder was feeding ? I won’t buy the ones from that chain store Pet City, when I checked them out they are made purely for lab animals and the fat and salt levels are excessive and the fibre is way too low (They are manufactured in WA). The Peters Pellets aren’t perfect but they are the closest to healthy that are readily available.
As I said a primiliminary vet check up is a good idea in any circumstance…. I do feel that the change in pellets certainly contributed but I don’t think they would cause the straining unless the old pellets were unbelievably low in fibre and very high in fat.