I'm not good at converting cm to inches....but I think the length of the smaller crickets is fine. (We use cm here in Canada but we didn't convert to metric until I had already been used to inches.)
Do you gutload the crickets? What they eat can make a difference to the taste of them IMHO so it wouldn't surprise me a change in their diet could help his appetite.
You said..."I do not on the air-con for fear of affecting my cham"..I don't have airconditioning in the whole house (just the bedrooms) because of the reptiles...but I have heard of many people who do and it seems to be okay.
You said...My cage is beside the window, it is birhg there but no direct sunlight shines in"...I think he needs some direct sun or UVB from a light even though young panther's skin transmits more UVB than older ones' skins do.
The following site says this about UVB for Juvenile Panther Chameleons..."Skin from several baby panthers were tested and UVB transmission was found to be around 50%, and a sample from a sub-adult male transmitted 42%. These readings are significantly higher than for the adults tested. A number of reasons for this difference are suggested below:
1. Fig. 15: baby panther chameleons hide in bushes
Body size / overall skin thickness.
A panther’s skin is thinner when a baby than as an adult.
However when comparing skin thickness and UV transmission across species, both Oustalet’s and Parson's skin are thicker than panthers and yet both allow more UV through. Therefore it seems likely this extra transmission is for reasons other than, or at least not limited to, body size.
2. Requirements for Growth.
Baby chameleons are fast growing and the demands of laying enough calcium down for strong bones means their D3 requirements and therefore their UVB requirements are higher than those of adults.
3. Basking Preferences. At times of higher D3 requirements (e.g. gravid female) adults increase the time they spend basking, and the resulting additional UVB exposure facilitates higher vitamin D3 photobiosynthesis. Unfortunately basking in the wild carries a cost, namely, exposure to predators. (It’s also worth mentioning that basking reptiles tend to bask longer and have slightly higher body temperatures in captivity than in the wild, possibly because the threat of predation is removed.)
The dangers of predation for a baby chameleon would be higher than for an adult. In fact it would seem so much more dangerous that baby chameleons inhabit a different area from the adults. The wild Jackson’s chameleons from the back garden of Mary Lovin in Hawaii 52 illustrate this point well. Adult Jackson’s tend to inhabit the middle to top of the trees and bushes. The babies spend their time closer to the ground in more sheltered low-level bushes.
The babies by habit and habitat are not exposed to the same levels of direct sunlight as the adults. It seems possible that the higher UVB transmission in the babies’ skin would compensate for the more sheltered environment, where there is less UVB light, and also for the babies’ higher demand for vitamin D3.
In captivity, we should consider the extra UVB requirements that a baby may have compared to the adult. However, sufficient UV shelter (generally provided by live plants) and a UV gradient must be provided to allow for proper self-regulation of exposure."
http://www.uvguide.co.uk/skintests.htm
You said..."I understand wat u mean by the sausage like poop, they're prolly the digested crix. However, I'm wondering if the yellowish puddle be the meal worms i leave inside as well"..there should be something that looks like poop even if he is only eating mealworms as long as he is digesting them. If they weren't well-digested you should see bits of the insects in there but it might not appear "whole" (like a sausage) though. Yellowness to the urate part can mean imbalance in the vitamins he's getting or it can have to do with dehydration...but its usually more hard and solid if its from that. Again...just from my experience.
You said..."I understand how tough it must be for someone on the other end to even think of the possible reasons for an animal's ailment"...I'm not a vet and whatever I tell you comes from my own experience or reading or talking to others...so some things I have a good idea of how to solve and others I don't. The fact that we live in different climates makes it more difficult because different care is needed in different countries. My chameleons will need less water here in a cooler climate than yours will, so its hard to determine if yours are well enough hydrated, for example. Not seeing a photo of the animal, in some cases (like if it might have MBD) makes a difference too.
Its bothering me that your chameleon is that young and doesn't have a good appetite...and rather than see you just give him vitamins and calcium orally (like you asked about in a previous post), I think the reason for his lack of appetite needs to be figured out. I think it should go to a vet to find out what's going on. Chameleons often hide the fact that something is wrong until its too late.
Pharmacies sell a liquid calcium for humans (Calcium Sandoz} that you could use to give him calcium, but care needs to be taken not to overdo it. I only use it in cases of MBD to get the calcium levels back up. Your chameleon still needs enough UVB to be able to produce the D3 he needs to be able to use the calcium....and I still think you need to find out why he's not eating.
Keep in touch please.