What would cause the eyes to become crusted shut about 20 days in from the purchase date?
Also, the vet states it is a Vit A/D injection 0.01CC diluted to 1:10. Is this dilution still considered lethal? I suppose we still don't know the concentration before dilution but I assume there is a standard amount of mg or mcg per ml.
Without knowing the actual concentration used, can't really do much and different brands have different concentrations. There does not seem to be a standard agreed upon. We also don't know what formulary the vet was going by. I've seen numbers all over the place (50-100,000 IU/kg). I think at the moment, it is generally recommended that injections be given in doses less than 2,000 IU/kg and that toxicity has been noted in some animals at 5,000 IU/kg. Frye back in 1995 was suggesting around 500 IU/kg. Mcarthur/Wilkinson/Meyer in 2004 were suggesting around 200-300 IU/kg. Mader suggested 200-300 IU/kg to start with for aquatic turtles in 2006 (also suggested the same amount in his 1996 book but didn't actually specify aquatic turtles). Mader has a new book that just recently came out this year or is still in pre-order status so it might be possible the dosage he recommends could have changed or just stayed the same. It does seem that higher doses are possible when done as dietary supplement/oral doses, but it is still possible to overdose orally. It's the injections that seems to be most lethal. In humans, for example, it's possible to overdose Vit A through diet - just eat a polar bear liver and you probably will die from Vit A toxicity.
In post #88 of this thread, Jon stated the turtle had bubbles coming out of it's nose and mouth. The vet report reads "N" for normal next to these. He also states the turtle got worse after force feeding. Did the turtle get better before the vet examined it? Didn't show signs of respiritory problems according to the report.
Under diet... "reptomin pellets"
Under habitat... "Cage description: plastic container water changes eod"
Under cage contents... question not answered.
Under heat/light sources... questions not answered.
Under Objectives... " 8. Integument ___Shell soft, algae covering"
Under Assessment... "Swollen eyes, prob Vit def. Soft shell, underweight. Still eating which is good."
I know for a fact that reptomin is a perfectly adequate diet all by itself for aquatic turtles from hatching up through their first year. As they get bigger and their appetites increase it's usually best to supplement with other food products than just the soft sticks (plus repto is expensive). I personally use pond strike (kinda looks like small dog food made for fish). So from a dietary standpoint, I cannot see any reason for a vitamin A/D deficiency in a month old turtle that was stated in the vet report to be 'eating'. A turtle that has never eaten since hatching could wind up with an obvious deficiency, but for an actively eating turtle eating a suitable diet - not likely.
Plastic container for habitat. Nothing wrong with that. Obviously the container is not being filtered since there are no cage contents listed. Again nothing wrong with that. I do that with baby turtles myself.
No heat/light sources.. I can let that slide since we are talking about snappers. Room temp water (i.e. 70-75F) isn't a problem for them they are that hardy. Adults can easily go lower, but usually that's when you are trying to semi-brumate. Light - If the room is well lit, not really an issue. If the turtle is kept in a room that gets little/no natural light then I would probably have an issue because there are no light sources listed as being used.
Water being changed every other day... With a non-filtered container that's what I call big a no-no. Right now I have a couple of 4 month old mud turtles living in a small rubber maid bowl. I can clean it out, give fresh water, feed them just 4 repto sticks.. and within a couple hours that water is just plain nasty and cloudy and by afternoon it REEKS. I feed every other day, but even on the days that they aren't fed, I still have to clean the water because they are usually pooping out the previous day's meal. On feeding days they have to be cleaned out in the morning and again in the afternoon or evening.
swollen eyes.. a vague symptom for many turtle issues. Most turtles are not bothered by tap water, but I've seen turtles get swollen eyes from being in tap water in areas where the city puts A LOT of chlorine in the supply. Problem clears up when the water is treated to remove the chlorine before getting used in a tank. But swollen eyes are also frequently seen when turtles are kept in unsanitary conditions for extended periods of time. They can also have swollen eyes when they are generally unwell or have colds/respiratory problems.
Curious to see.. "algae covering". only way that could likely happen is if the water isn't being cleaned at all and the turtle is sitting in stagnant water for days on end or if the water is being cleaned, but the container itself is not being properly scrubbed/disinfected like it should. It takes quite a bit of time for algae to develop because it needs something to build on..that every so slight/invisible biofilm that didn't get scrubbed away is a perfect spot for algae to begin to take hold. A turtle sitting in stagnant water will develop it's own layer of biofilm on its shell.. would take longer for algae to grab hold of the shell in cleaner water (unless there is significant light shining on the turtle to fuel the growth). But, knowing baby snappers, they often have a lot of old bits of shredded looking skin that stick up on the limbs, neck and shell... someone could maybe mistake that for algae.
Also... looking back.. overlooked this... The turtle being force fed. Something not listed in the vet report and appears to have happened before the turtle ever went to the vet. Fed through a syringe. sigh. Very very easy to accidentally cause small turtles (& even adults) to aspirate the slurry into the lungs which would only make things that much more problematic. Wondering if the vet had even been made aware of this...maybe they would have seen the turtle's condition in a different light rather than as a dietary deficiency.
In light of the "lethargy/swollen eyes", that the container is only being cleaned EOD (though the algae growth would suggest longer periods between cleaning or just plain badly done cleanings), that the OP stated there were "bubbles", and that the turtle was having liquid food forced down it's throat I would lean towards possible pneumonia/respiratory illness due to habitat conditions and/or aspirated food slurry or combination of the two. And the vet possibly not being given all the info, could have possibly made decisions that likely worsened the condition of the animal.