Recently, both of my American Bullfrogs have been acting very worrying.

Both have been seeming to 'faint' after consuming a considerable amount of crickets, and having woken up several seconds later. That, or they've been having trouble consuming food. Gnag has been not eating half the amount he regularly does, and the both of them have been intermittently getting tetany. I've been feeding them Calcium dusted crickets whenever I can, but it seems they'll only eat when they regain their tetany. Last feeding, Gnag showed a sign of irritation after consuming a cricket. He kind of hissed/wheezed, opened his mouth like he was in pain, and then shut it, before swallowing the cricket.

As for possible causes, recently the weather has been fluctuating and changing rapidly, with it being at 15 Celsius (59 Fahrenheit) to 30 Celsius (86 Fahrenheit), changing sometimes day to day, even going from near freezing in the morning to like a desert later on in the day abruptly. Also, a month or two back, I was forced to take moss from my garden, thoroughly clean it, and put it in both of their tanks. This was before Gnag first fainted whilst eating a Hornworm, which I assume he took the wrong way down, though he's eaten such before.

I've seen Gnag faint three times so far, once a month or so ago, once about three weeks ago, and once a week or so back. He has also been eating very little as well as intermittently contracting tetany. Bumpy, on the other hand, I've witnessed faint once, tonight, and whilst his feeding amount is judged by his weight and plumpness, it seems he's been on the lower end of eating as of late. I've been trying to fight off the tetany with every time they eat, using calcium-dusted crickets almost every feeding. Gnag's been eating in a every 3-5 days, and at most 8 crickets per feeding.

I've asked my friends for help, and some have said it's to do with the fact the both of them are growing a considerable amount this year. Others believe it's to do with the erratic weather. Another theory that I think is the cause is that something introduced by the moss from outside has somehow caused irritation in the throats of both of my frogs, causing the fainting.

Anyone have any idea of what's going on? I'm planning to consult a Vet sometime soon on this, it's really concerning me.