Ok, i can see the frustration you're occuring due to this being totally unexpected. But in situations like the one your in, you have to make decisions based on what you see fit. We can give opinions but it is ultimately you that has to decide what may be best for the animal. For one the feeding factor can solved relatively simply. The husbandry is what I'm worried about. The stress of being n a "dog kennel" can cause stress to make the whole thing worse regardless of what it is supposed to eat. If it gets stressed enough it might not hold any of the food down, may not eat, or any other number of problems. The next thing is temperature. I know you are trying and have nothing else but I think you need to act quickly. The dog kennel has to many holes and is virtually impossible to hold the heat in. This is taken directly from pro-exotics caresheet on black throat (as savannahs are exactly the same). Here it is-----
"Temperatures are another crucial factor (along with proper hydration and nutrition) to a healthy monitor. You cannot afford to make a mistake in this area, as it can mean life or death for your animal. You also cannot cut corners in this area. Toss out your dial thermometers, and stick those color changing strips on the bottom of the trashcan, that is where they belong. You can get terrific digital thermometers from Pro Exotics for $15. These come with a probe, and they have a Min/Max reading as well. You can mount the base of the thermometer inside the cage, in an area away from the basking spot, to measure the ambient temperature of the cage itself. Move the probe around the cage, check the basking spot, check the hide spots, check the "favorite" spot, check the far end of the cage. Check it all, and know what is happening. Find the range of your cage, from hottest spot to coldest spot, use the Min/Max reading to check your night drop, and make sure these temps fall within the parameters you have set. If they don't match, do what you need to do to get them there. Changing a hot spot from 95°F to 130° F is often as simple as raising the basking spot a few more inches toward the basking light. (Upgrade your temperature capabilities with a Temp Gun.)
We use basking spot temperatures of 130° F for the Blackthroat babies, with ambient cage temperatures of 85° F. At night, it is important that the temperatures do not drop much below 80° F. If you insist on allowing the temps to drop below 80°, you may start to court respiratory infections, so it is important to use red bulbs, ceramic bulbs, heat panels, or whatever it takes to keep those temps up and your monitor healthy. Many large monitor breeders, including Pro Exotics, often run daylight cycles and temps 24 hours a day. This keeps temps up, metabolism high, and our monitors stay in the best of health. You don't have to run a 24/7 day cycle, but look at your night drop closely when brainstorming about your lethargic (or mouth bubbling, or non eating) monitor."
Going back to feeding, this is directly from : http://www.anapsid.org/savannah.html
" Adults (three or more feet in length) can be fed twice a week, adjusted as necessary based on weight gain and amount of exercise. Obesity in savannahs, a serious health condition caused by improper husbandry, is all too common in captivity. You will have to use your judgment, observing how the monitor looks, taking into consideration the temperature and amount of activity. Start with a couple of mice or weanling rats a week."
Which then explains that there is no magic number that will work 100% perfect. YOU have to decide. If your animal is slightly obese then cut the food intake down to smaller items once per week. Since the cage is so very small I seriously don't think that it is exercising very much. Which then throws us back in the husbandry area.
This is getting long so I'll cut it here. Hope this gives you a better idea. You have to decide on what you are going to do short term and more importantly long term. If you are going to keep it then ASAP go to a home depot, lowes or where ever, and build an enclosue for under $100 bucks and in 1 afternoon. Then you can proceed to figure out how the animal is responding to the amount being fed, You see. It's not as bad as you think....
LATER